Specifications 1.stereo headset 2.time of endurance:about 4hours 3.stand-by time:about 120hours Product features : 1.Bluetooth headset specification:V3.0+EDR 2.Bluetooth version: V3.0,compatible V1.1,V1.0,V1.2,V2.0 3.Support model: A2DP,Headset,Handfree 4.Data of battery: High performance lithium polymer battery 5.Transmission frequency:2.4GHZ 6.stereo headset7.time of endurance:about 4hours8.stand-by time:about 120hours 9.range of application:mobile phone with support bluetooth function,table pc,notebook would you like to know more about Bluetooth headset for other consumer electronics ,we will provide more for you, welcome to consult us....
Specifications Stereo headphone mp3 player fm radio bluetooth headset 3 in 1, Bluetooth headset, MP3 player, FM radio Specifications 1.Bluetooth headset for mobile phone
Specifications R15 Bluetooth V4.0+EDR Bluetooth Headset For Cell Phone *Bluetooth V4.0+EDR *Receive or make a call *Low power comsumption G18 Bluetooth V4.0+EDR Bluetooth Headphone For Cell Phone Key specifications:Bluetooth specification: V4.0+EDRBluetooth profiles: HSP, HFP, A2DPOperating distance: 10 meters Class IIRechargeable 90 mAH Li-polymer batteryTalk time: Up to 3 hoursMusic playing time: Up to 3 hoursCharging time: About 1.5 hoursSpecial features:In-ear type with confortable earplug, easy to take with you.Enjoy stereo music wirelessly from Bluetooth A2DP devices.Embedded microphone for hands-free conversation from Bluetooth-enabled cell phones.When receives an incoming call, the music will pause automatically.Easy controls for mute, call transfer, voice dial and call answer/end/reject.Support remote control of play/pause, volume up and volume down.Automatically connect to the last connected Bluetooth device.Micro USB connector charging via AC charg
Specifications Bluetooth Headphone Headset 1.Neckband design 2.Suitable for all bluetooth 3.Built-in Microphone 4.Sports Bluetooth Headphone Headset For Mobile Phone Model No.BTS-0501NSupporting EditionBluetooth version: V2.1+EDR Frequency Range2.4GHz - 2.48GHzBluetooth Protocol A2DP/AVRCP/HFP/HSPTransmission Distance About 10MTalking time of Headphone Headset ≥ 5 hoursStandby time of Headphone Headset More than 30 hours Environment Temp.Working-20 °c - 60°cCharging0 °c - 45°cStorage-20 °c - 60°cOperating Voltage4.2VOperating Current≤ 35mAStandby Current≤ 2mABattery Type (Built in)Polymer Lithium Cycle Life300 charging cyclesAdaptor Input110.0 - 220V / 50 - 60Hz / 125mA OutputDC 5.0V / ≤ 80mACharge Time (Duration to reach full)2 - 3hoursDimensions (L*W*H) of Headphone Headset 15*10*5.5cm(For gift box) Approx Weight of Headphone Headset 44g Bluetooth connecting peopleBuilt-in
Specifications 1.Frequency coverage: 2.402~2.480GHz ISM band 2.Sensitivity: -80dbm 3.Transmit range: up to 10m 4.Transmit speed: 57~723Kbp Fashion Sports Wireless Bluetooth Headset Earphone Headphone Earphone for Telehone PC Portable back-hang design, convenient for sportsSuitable for mobile phones, PC, and iPod Handsfree speaking by pairing with mobile phone Enjoy music of iPod with adaptive dongle Can receive and reject incoming calls while automatically stop music Volume adjustment Bluetooth version: 1.2/V2.1, wireless transmitter standard of class II Frequency coverage: 2.402~2.480GHz ISM band Sensitivity: -80dbmTransmit range: up to 10m Transmit speed: 57~723Kbps Stereo compression ratio: 44.1/48kHz Channel: 79 channels of 1MHz, B/W Contact terms: Point-to-PointBattery: Li-ion. Charge power : PC USB, 5V Charging time: 1-2 hours 40g/pcsPacking:blister
Brand Name: OEM Model Number: LF-609 Style: Ear Hook Communication: Wireless Use: Mobile Phone Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) Color: black Packaging & Delivery Packaging Detail: 100pcs/ctn, Measure: 53*34*46.5 CM. G.W.:11kgs PACKET CONTENT: 1.headset unit 2. ear hook 3. manual 4.charge Delivery Detail: 5-7 days after receip the payment Specifications 1.mono bluetooth headset earphone 2.Built-in rechargeable battery 3. with volume controk key 4.Distinctly superior Fashionable bluetooth headset, bluetooth earphone, bluetooth speaker phone,mono/stereo bluetooth headset Bluetooth standard: V2.1+EDR Transmission: class2 Working range:10M &nbs
Specifications Newest Design Wireless Bluetooth Headphone 1.Earphone for mobile phone. 2.Reduce radiation. 3.Senior Quality. 4.Small MOQ. Newest Design Wireless Bluetooth Headphone •Feature 1.Powerful compatibility, Suitable for different brands of mobile phone.2.The Retro Handset combines classic style with a contemporary edge and is finished with a luxurious soft-touch texture with multifunction.3. Noise reduction system, this handset offers excellent sound quality and eliminates up to 99% of electro magnetic interference.4. Can be used for flat panel comp
Specifications Multi-point technology bluetooth headset BH29 Bluetooth Echo and Noise Cancellation Headset Dual-Microphone HOT 2013 Multi-point technology bluetooth headset headphone BH29 Feature :Dual-Microphone CVC V5.0, Echo and Noise Cancellation, Packet/bit Error Correction TechnologyBluetooth Specification V2.1+EDR class 2 Supports connecting to two phones simultaneously Rechargeable 80mAh Li-Polymer Battery Normal charging time: Max 1.5 hours Talk time: Up to 4.5 HoursStandby time: Up to 120 hours Specification * Bluetooth Specification v2.1+EDR class 2 * Multi-point technology, CSR BC6150 chip* HFP V1.5 and HSP v1.1 support* RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band* Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm* Frequency Response: 20Hz- 20kHz, Very high Signal to Noise Ratio (SNR): 95Db,Total Harmonic Distortion(THD): 0.1%* 3 Buttons design: MFB, VOL+, VOL-* LED Indicator Status: Blue, Red* Rechargeable 80mAh L
Specifications 1. Bluetooth Headsets Earphones Convenient For Sports 2. Built in Microphone 3. Stereo 4.Color: Black,red,blue,green Bluetooth Headsets Earphones Convenient For Sports Features:1. Wireless appreciation in the mobile phone play the stereo music.2. listen to the radio broadcast computer stereo music.3. Use the network to realize the remote wireless two-way conversation.4. Radio listening to the stereo music, dial out, answer the call to be automatic conversion.5. Portable back-hang design, convenient for sports.6. Allow you answer the phone anytime and anywhere.7. Built in Microphone for Handsfree Cell Phone use.8. Can answer calls from any phone. Specifications: ColorBlack/Red/Blue/GreenWeight75gButtonsPlay/ Pause, VOL +, VO -, Call/ ReceiveCharging time1-2 hoursPlay time4 hoursStandby time250 hoursUSB Cable LengthAbout 62 cm/ 24.8''Bluetooth versionV2.1+EDAudio range2.402GHZ~2.480GHZ ISM BandBatteryBuilt-in lithium battery (charged via 2.0 USB)Channel79cha
Brand Name: OEM Model Number: Y-3144 Style: In-Ear Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Packaging & Delivery Packaging Detail: standard package Delivery Detail: 3-5 days upon receipt of the payment Specifications Mini USB IN Built-in lithium battery (charged via USB) Built in Microphone for Handsfree Cell Phone use Sports Wireless Bluetooth Headset Headphone Earphone 4 colors This Bluetooth not listen to music for your phone ,it just call and answer for mostly phone! it just listen to music for series phone !hope you know this before you buy it! •Easy to use•Portable back-hang design, convenient for sports•Allow you answer the phone anytime and anywhere•Suitable for phone or pcSpecifications:•Buttons: Play/ Pause, VOL +, VO -, Call/ Receive•Talk time: 4 hours•Standby time: 100 hours•Dimension: About 14.5 x 13.5 cm•Mini USB IN•Buil
Brand Name: xinqite Model Number: F233 Style: In-Ear Communication: Wireless Use: Mobile Phone Function: Bluetooth Place of Origin: Zhejiang China (Mainland) Packaging & Delivery Packaging Detail: Carton Delivery Detail: According to your order Specifications 1.Material:ABS+electronic elements 2.Size:2.5*1.5cm 3.Packing:Color+PVC Bluetooth headset Material:ABS+electronicSize:2.5*1.5cmWeight:59g Packing:color+PVCPacking:14*9*3.5cmPacking quantity:50 pcs per ctn Equipped with power charger and bluetooth headset hang
Brand Name: Rambotech Model Number: BSH555 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Multiple connectivity options: Line-in, BLE 4.0 Operating range: 10 meters Talk time: Up to 12 hours Music playback time: 8 hours Standby time: Up to 500 hours Packaging & Delivery Packaging Detail: color box Delivery Detail: 35 days Specifications bluetooth headphone 1. Hi-Fi visual 3D 2. Bluetooth V4.0+EDR 3. CD quality music through APTX 4. Wired+wireless headphone HIFI Bluetooth headphone BSH555,New product!!! looking for distributor bluetooth headphone Model: BSH555 Feature*Hi-Fi visual 3D stereo Bluetooth headphone*Bluetooth V4.0+EDR compliant*CD quality music through APTX, compatible with Bluetooth-enabled mobile phone,PDA,PC and other equipment*Multiple connectivity options: Line-in, BLE 4.0*A2DP switch between two connected phones*Automatically switch between line-
Specifications T90 Wireless Bluetooth Headphone For PS3 1. Range 10 M 2. Talk Time: Up to 5.5 Hours 3. Standby Time: Up to 100 Hrs T90 Wireless Bluetooth Headphone For PS3 Rubber-Black (84004040) Introductions:Are you looking for a headset for PS3? Here we offer you a fantastic headset to feel the full-mouthed and realistic sound. It features faster connection and anti-interference, so that you can enjoy clearer voice transmission and sound quality.Use-friendly design ensures convenient usage and all-day wearing comfort. Equipped with it, you can experience with stimulation function.It is a perfect partner for PS3. Just order one to have a different gameplay experience. Features:1. The wireless Bluetooth gaming headset for PS3 and PC provides crystal clear communication when playing popular First Person Shooter (FPS) such as Call Of Duty, Battle Field Bad Company 2, Black Ops and Crysis 2 2. Provides high quality ster
Brand Name: OEM Model Number: headset Style: Headband Communication: Wireless Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) Packaging & Delivery Packaging Detail: anti-static bag,paper box,polybag. Delivery Detail: within 48 hours after received payment Specifications 1. Headphone with Leather earpad, more comfortable 2. Music heaphone with High-Fidelity, 3. Headset with Foldable design Best sale top quality most popular brand name bluetooth headset Key specifications:Bluetooth specification: V2.1+EDRBluetooth profiles: HSP, HFP, A2DP and AVRCPOperating distance: 10 meters Class IIRechargeable 430 mAH Li-polymer batteryTalk time: Up to 16 hoursMusic playing time: Up to 14 hoursCharging time: About 3 hours Special features:Folding and retractable design, easy to take with you.Enjoy stereo music wirelessly from Bluetooth A2DP d
Brand Name: iStyleCity Model Number: ISCT-BLHEADSET Style: In-Ear Communication: Wireless Use: Portable Media Player Function: Bluetooth Place of Origin: Guangdong China (Mainland) Color: Silver Type: Mono Bluetooth Headset Weight: 6 g Package: Blister Package Specification: 47*15*7mm paypal: accept Packaging & Delivery Packaging Detail: Blister Package Delivery Detail: 3-10 working days after payment done Specifications Universal Mono Bluetooth Headset 1.good quality 2.bluetooth headset 3.factory price 4.OEM Company Brief Introduction: 1.ISTYLECITY.COM LTD is a leading manufacturer and exporter specializing in accessories for iPhone, for iPad & for iPod . 2. ISTYLECITY.COM LTD was established in 2009,with office in USA!3.We offer a large selection of products ranging from Car Kits, Cases, Chargers & Cables, Cradles & Docks, Headphones, Headsets, Screen Protectors, Stylus Pen and more Details: 2 wearing stylesLong headset, close fitOn/off slider switchN
Specifications 1.Mini Bluetooth Headphone 2.Pink 3.Bluetooth V2.1 4.Talk time: 5 hours ProductMini Pink Wireless Bluetooth HeadphoneProduct Highlight1. The mini Bluetooth headphone supports Headset Profile and Handfree Profile.2. Last number redial, call rejection and adjust volume, etc.3. Through the use of Bluetooth wireless transmitter, the Bluetooth headphone makes online chat reality.4. Cell phone loss protection, call note.5. With stylish design, the mini Bluetooth headphone functions as an ornament.6. Application: The mini Bluetooth headphone, a type of wireless products, offers compatibility with all famous branded Bluetooth cell phone and is used as a handsfree. Coupled with a Bluetooth dongle, it makes online voice chat a areality.Specifications1. Bluetooth version: Bluetooth V2.1, compatible with V2.0 and V1.22. Chip: CSR BC63. Transmission distance: 10M(Class 2)4. Frequency:2.4GHz5. Stanby time: 90 hours6. Talk time: 5 hours7. Charge hour: less than 2 hours8. Power supply:
Specifications Sports Stereo Bluetooth Headset Working distance: 10meters Powered with US Plug Wall Charger Flexible and durable material Sports Stereo Bluetooth Headset For Iphone Samsung Galaxy HTC Specification: NameSports Stereo Bluetooth Headset For Iphone Samsung Galaxy HTC Material Flexible and durable material DesignStereo Bluetooth Headset ColorWhitePackagePolybag inner,Carton outerPayment termPaypal,T/T,Western Union,Money Gram,L/C,escrowDeliveryGenerally 5-7 daysShipment wayDHL(3~5days),UPS(5~7days),FEDEX(7-10days),EMS(10-15days), China Airparcel post (15-30days), by sea or by air (bulk goods).Quality controlwe have professional technician to inspect the qulity before shipment in house, orinspect by machine.we welcome your feedbacks and assure
Brand Name: BYZ Model Number: BYZ-S300 Style: In-Ear Communication: Wired Connectors: 3.5mm Use: Mobile Phone Function: Noise Cancelling Place of Origin: Guangdong China (Mainland) Certificate:: CE, FCC sample:: one piece mini bluetooth headset colorful &headphones paypal for:: computer, mobilephone OEM:: Yes Leadtime:: 25-35days cable length:: 130cm speaker size:: 12mm Packaging Detail:: 1piece in a saling bag logo:: requested colors :: all king of colors are available Packaging & Delivery Packaging Detail: carton Delivery Detail: 10-15 days after payment Specifications mini bluetooth headset colorful &headphones paypal 1 Manufactory directly saling 2.High sound quality 3.Nice design mini bluetooth headset colorful &headphones paypal Model No.: BYZ-S300 Parameter: Speaker size 12mm Impedance32ohmSensitivity116±3dBmFrequency range 20-2khzFunctionNoising cancellingWiresFlat cableUsageMo
Brand Name: Finsoud Model Number: L1 Style: Headband Communication: Wireless Connectors: Other Use: Mobilephone, Laptop,iphone,ipad,Tablet pc Function: Bluetooth,Support bluetooth A2DP,AVRCP Place of Origin: Guangdong China (Mainland) Effective range: up to 10-20M optional colour: Black / Pink / Blue Sound: Hi-Fi Sound quality Battery: Reacharge Lithium Battery Microphone: Built in Microphone Packaging & Delivery Packaging Detail: PVC giftbox + Paper card Delivery Detail: 20-25 days after order confirmed Specifications 1.Support A2DP, AVRCP; 2.Dual Antenna Reception 3.Smart connection; 4.Rechargeable battery system; 5.Built-in Mic. Model: L1 Stereo bluetooth headset Features Support A2DP function ,AVRCP remote control capabilitiesSupport Bluetooth specification V2.1 version, backwards compatible with V1.1, V1.2 version ; Support automatic switching to answer phone-call ,Play,Pause,Forward & backward selections, and with the end number re-dial func
Brand Name: Gamechn Style: Ear Hook Communication: Wireless Connectors: USB Use: video game Function: Bluetooth Specifications We offer Bluetooth Headset for ps3,wireless bluetooth headset,for ps3 accessories. We offer Bluetooth Headset for ps3,wireless bluetooth headset,for ps3 accessoriesShipping Order will be shipped within 1-2 business days once we receive your payment.If you pay by e-check, we will ship your order once your payment is cleared. A shipping notification with tracking number will be emailed to you once your order has been shipped. Items will be sent as a gift to avoid customs duty.We are not responsible for any customs duty incurred at foreign customs.---------------------------------------------------------------------------------Payment We accept payment via paypal. Credit card payment can also be made via paypal.Please make your payment within 14 days after checkout.To expedite your order processing please include your order number and buyer name in all forms of p
Specifications 1.Bluetooth V3.0,High-end audio quality 2.compatible with smart phone,car aux,home hifi,etc. 3.With an universal 3.5mm audio Sport stereo wireless bluetooth headphone for mobile,laptop,computer,MID specification: Bluetooth VersionV3.0Operating Distance10-15mBatteryBuilt-in rechargeable li-polymer batteryCharging PlugAC chargerDimensions51.8*18.4*14.5mmHeadset WeightAround 9.4gMultipoint TechnologyNoMulti-function Button On/OffYesStandard Bluetooth FeaturesYesStandby Time (days)7Supported ProfilesAVRCP,HFP,A2DP and HSPTalk/PlayTime (hrs)7In the Box1xbluetooth stereo transmitter receiver 1xstereo earphone1xAC charger1xUser manualOther Specifications1.Clip-on design with 3.5mm audio jack2.MicroUSB charge connection3.Voice dialing and LED indicaion4.Can works with home hifi,smart phone,corded headphone,car aux and RCA audio cable
Specifications *Wirless Bluetooth headphone *Stereo and strong sound *Compatible with cellphone,laptop,iphon,ipad *Competitive price F-0350 Wireless Bluetooth Headphone * Stereo bluetooth headphone* Work with mobile phonesm new Nano, tablet pc* Bluetooth Specification v2.1+EDR class2* Talk / music time: up to 10 hours * Effect range: 10 meters &n
Brand Name: Willong Model Number: EAR0764 Style: In-Ear Communication: Wireless Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: white type: bluetooth Packaging & Delivery Packaging Detail: 1pc/PE bag paper case /plastic case Delivery Detail: 3days-7days Specifications 1.divers in type:ear-bud/in ear/clip on 2.noise cancelling and stereo 3.CE/RHOS/FCC certification Bluetooth headphone willong quality worth to rely on !!! white bluetooth headphones Unique design ,best price!!!Specifications:1. Standards: Bluetooth specification V2.0/V2.1+EDR2. Radio Frequency Range:
Specifications bluetooth headphone 1.Fashional Design, 2.Stereo Bluetotoh Function 3.play music from your mobile 4.Bluetooth Headset v 2.1 bluetooth headphone Detailed Product Description Feartures: CE,ROHS,FCC and BQB ApprovalBluetooth Version V3.0/2.1+EDRSupports A2DP AVRCP, HSP and HFPEnjoy stereo music from coputer and mobileExtremely good quality,superior clear voiceMultimedia,stereo, foldable Headphone,NecKphoneHandsfree,compatible with all Bluetooth Devices Such As PS3 & IPHONEHigh Capacity&Rechargeable Lion BatteryAutomatic cennecting functionEnergy saving function,200% longer talk timHandsfree,answer/reject call and call the last coming NO.Voice Dialing,Re-dialing functionRemote control music playback,pause,up and down selections Volume control key,volume up and down Technical Paramiter: Frequency range: 40HZ-18KHz Transmission power:class2Transmission distance:10MOperating voltage:3.7VOperating current:&le
Brand Name: pak Model Number: pak15 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Portable Media Player Function: Noise Cancelling Place of Origin: Guangdong China (Mainland) Color: black Packaging & Delivery Packaging Detail: packing with retail box Delivery Detail: 1~3 days for big quantity order after receiving fund Specifications stereo bluetooth headset with mp3 player 1.Fast delivery headphone 2.High production with high quality 3.factory price Detailed Product Description stereo bluetooth headset with mp3 player 1.Fast delivery headphone 2.High production with high quality 3.factory price Feature 1)Original packing2)factory price3)mixed order is acceptable4)Drop shipping available5)Door to Door service,safe and fast6)shipping time:we will send the goods within 48 hours after your payment,and delivery about 3-4 days to you.
Brand Name: Fordex Group Model Number: FW-00575042 Style: In-Ear Communication: Wired Connectors: 3.5mm Use: Computer Function: Bluetooth Place of Origin: Guangdong China (Mainland) Type: Earphones Features: Bluetooth Packaging Items per Carton: 2 Pieces/Carton Package Measurements: 17X10X8 cm Gross Weight: 0.3 kg Gross Weight per Unit: 0.15 kg Package Size per Unit: 17X10X4 cm Package Type: Package Type: carton
Brand Name: AROCCOM Model Number: ELF-BH01 Style: Ear Hook Communication: Wireless Connectors: Bluetooth Use: mobile phone,tablets with call function Function: Bluetooth,Waterproof,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) Color: Black Pattern: Ear-hooking Pattern Weight: 8.9g Battery Capacity: 80mA Packaging & Delivery Packaging Detail: 1. Neutral Packing 2. OEM Packing Delivery Detail: About 20 days after sample approval Specifications High sensitivity,low power consumption,suitable for smart phones,tablets with call function Battery:80mA 8.9g soft materials bluetooth headphone,bluetooth earphone for iphone5 for Smart Phone and Tablets with call function Highlights: Compact, portable and fashionable design, easy to carry A Bluetooth headset supports 2 mobile phones at the same time , the housing of headset is plastic with rubber painting CSR V2.1+EDR Bluetooth chipset, Lithium polymer batteryHigh sensitivity, low power co
Brand Name: BYZ Model Number: TZY-M2005 Communication: Wired Connectors: 3.5mm Use: Mobile Phone Function: Noise Cancelling Place of Origin: Guangdong China (Mainland) Certificate:: CE, FCC sample:: one piece earphones &bluetooth headset in packing for:: computer, mobilephone OEM:: Yes Leadtime:: 25-35days cable length:: 130cm speaker size:: 12mm Packaging Detail:: 1piece in a saling bag logo:: requested colors :: all king of colors are available Packaging & Delivery Packaging Detail: carton Delivery Detail: 10-15 days after payment Specifications earphones &bluetooth headset in packing 1. Manufactory directly saling 2. High sound quality 3 Nice design earphones &bluetooth headset in packing Model No.: TZY-M2005 Parameter: Speaker size 12mm Impedance32ohmSensitivity116±3dBmFrequency range 20-2khzFunctionNoising cancellingWiresFlat cableUsageMobile ear phone, computerCertificateCE,
Brand Name: UTEL Model Number: E99(Stereo) Style: Headband Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth Place of Origin: Fujian China (Mainland) Color: Red/Silver Specifications Bluetooth Headphone with foldable ,portable and fashional design . 1; 2 in 1 function 2 ;Bluetooth Verion in 2.1 3 ; CSR
Specifications Stylish design Flexible OEM service Good quality k802 Professional Bluetooth Headset size 56x 16 x 8.5 mm weight 8.9g Bluetooth Standard bluetooth V2.1 + EDR Frequency Range 2.4GHz Operation Class 2 Bluetooth Mode headset/handfree/A2DP/AVRCP Operating range up to 30 feet (10 metres) Talk Time up to 5 hours MP3 Playing Time up to 5 hours Standby Time up to 100 hours Charging Time 2-3 hours Charge Voltage input 110-240V, DC:output 5.3V Included Accessories:1.Micro USB charging cable2.Earhook 3.User manual &n