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
Specifications MP3 neckband headphone 1.FM radio and Campus Radio 2. Bluetooth support 3. 16G SD card 4. Hi-Fi sound 2013 mp3 player wireless bluetooth headphones for laptop Features :Specifications :1st: Hi-fi Bluetooth Card Read Headphone♥ Play high quality MP3 from TF cards 2nd:Lyrics Synchronous Display♥ Hi-Fi sound3rd:Beautiful packing and headphone♥ Rechargeable lithium battery inside4th:OLED Display Screen♥ Folding headphone5th:Support 16GB TF Play♥ Blue backlight with LCD track informationNewest Bluetooth Card Read Headset:♥ Line in & out functionModelMJ-368♥ Memory functionColorBlack,Grey,Blue,Pink♥Bluetooth V3.0+EDR, High Data Rate TransmittingStyleBluetooth MP3 Headphones♥To Support Campus RadioN.W12.9 KGS♥FM radio funciton G.W14 KGS♥ 8 Sounds Available,To Cater Different Music DemandCTN. Size61.5x43.5x35.5cm♥ Wearing ComfortablePacking60 pcs /C
Specifications Bling bling earphone/bling bluetooth headphones 1.Newest easy-to-use bluetooth 2.High Acoustic Fidelity Bling bling earphone/bling bluetooth headphones Namebling bluetooth headphonesFrequency Response20Hz-20KHzSensitivity108dB±3dB S.P.L at 1kHzImpedance32ohm±10%Plug Type3.5mmOutput10MWDiamondSwarovskiDiamond Size3.0mm /SS12Weight150g/PCLogoCan be PritedPacking1pc in a OPP bagMOQ1200 PCSample day5-7DaysDelivery day15-30Days more details about the earphone .....this way pls!!!
Specifications 1. stereo headphone with bluetooth 2. bluetooth headphone with mp3 player 3. support 16GB TF card 4. sport style,easy to wear Sport FM Radio Wireless Stereo Bluetooth Headphone with TF Card MP3 Playing Function Specifications1. stereo earphone with bluetooth2. bluetooth earphone with mp3 player3. support 16GB TF card4. sport style, easy to wear MP3 + volume control.Bluetooth master keys.Key functionsoperatingsound state of the instructionsAccording to three seconds longer boot pairing blue light. LongBoot length by 2 seconds the blue lights flashLong by 3 seconds off the blue lights outClick to connect a short blue light flash According to the two short weight dial voice promptA short&
Specifications Handswriting pen bluetooth headset The BT Mini Phone is a handy handset that pairs up with your mobile, so that you ca Handswriting pen bluetooth headset
Specifications 1,Bluetooth headset bluetooth handsfree W28 2,In stock with competitive price 3,with safe packing,tested Features: Bluetooth headset,bluetooth handsfree model:W28Bluetooth v2.1+ EDR compatibilityConnecting people with BluetoothCompact & light weight,minimum battery consupptionLastest ergonomic design for style & comfortHigh fidelity digital microphone with noise cancelling technologyWorld wide design patent pendingCompatiable with almost the Bluetooth phonesSupports bluetooth headset and handsfree profilesCrystal clear stereo communicationSpeaker volume gian controlSpecifications:Supporting edition:2.1Frequency range:2.4GHz-2.48zTransmission power:Class2Trasmisssion distance:10MEnvironment Temperature:Working:-20oC-60oC &n
Brand Name: Yes-Hope Model Number: BT-1302 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Driver Unit: 30mm Frequency response: 20-22KHz Impedance: 32ohms Senstivity(at 1KHz): 115dB Max input power: 3.5mm stereo Packaging & Delivery Packaging Detail: polybag / gift box / blister card Delivery Detail: around 35 days receipt of deposit Specifications 1. Studio Headphone Mixer 2. Bluetooth headphone 3. Super sound quality, extra bass system 4. Suits for all audio * Hands-free Bluetooth stereo headphones* Headset with microphone, you can enjoy making phone calls and listening to music * Has buttons on the headphones for volume, next track and call answering controls* With built-in high capacity Li-polymer battery Product show: Package &nb
Specifications Bluetooth Headphone For PS3 1:High Capacity Lion Battery 2:Energy saving,6H Talk Time 3:Support AVRCP 4:Bluetooth 2.1+EDR Bluetooth Headphone For PS3 Video Game,Computer and Mobile Phone Feartures: CE,ROHS,FCC and BQB approvalBluetooth Version 2.1+EDRSupports AVRCP, HSP and HFPNoise Cancelling Function Bluetooth HeadphoneExtremely good quality,superior clear voiceErgonomic and Fashion designRemovable ear-hook fits either earBluetooth Handsfree Headset,compatible with most Bluetooth DevicesHigh Capacity&Rechargeable Lion BatteryExtremely Light:Only 7gAutomatic cennecting functionEnergy saving function,200% longer talk timHandsfree,answer/reject call and call the last coming NO.Voice Dialing,Re-dialing functionTechnical Paramiter: Frequency range:2.4GHz-2.48GHzTransmission power:class2Transmission distance:10MOperating voltage:3.6VOperating current:≤35mAStandby current:≤2mACharger power:Input 100~240V AC,Output 5V DCWorking temperature:-20&d
Model Number: SEA3GEA002 Style: Headband Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Usage: Mobile Phone Specifications good quality bluetooth headset
Specifications 1. V3.0 Stereo Bluetooth Headphone 2. Bislter Packing 3. 6 Regular Colors 4. Stereo Effect. 5. Stock delivery YPBH-W02 6 Colors V3.0 Stereo Bluetooth Headphone FEATURE ♥ Master chip:V3.0+EDR♥ Speaker: 30(Φmm) ♥ Sensitivity: 123(dB) ♥ Frequency range: 20-20KHZ SPECIFICATION ♥ High power, recharger li-polymer battery.♥ Voltage: 3.7V.♥ Charger and discharger protection IC.♥ Talk time up to 14 hours.♥ Standby time up to 250 hours. ♥ 6 Regular Colors: White, Black, Pink, Red, Orange, Blue PRODUCT PICTURE PRATICAL PRODUCT PHOTO PACKAGING COMPANY PROFILE Yinphone accessories Inc. has been dedicated in mobile phone accessories such as battery packs, chargers, faceplates, LCD and leather cases since 1995. Now we have added PDA accessories, digital camera battery packs and chargers to our business line.
Specifications Bluetooth Headset for iPhone 5; High SNR; Hidden omni-directional Mircrophone; No wire,no transmitter,no software,no setup. High SNR Bluetooth Headset for iPhone 5 Sepecification Bluetooth 2.1 wireless transmission protocol Transmission distance and range(10m, 360°) High SNR Bluetooth audio connection No wire,no transmitter,no software,no setup, it is easy and fast. 5: Automatic Switch-over between calls and musicHidden omni-directional Mircrophone 7: Low power indicaterAdjustable headband and foldedWorking duration:15h,charging duration:4hHeadset Spec.: frequency response:20-20KHz,SRN:85dB,working Voltage:3.7V,current:30mA speaker size:Φ40mmMicrophone Spec.:100Hz~10kHz&SRN≥55dB&Sensitivity:-42dB
Specifications Bluetooth Headset for all Mobile Phone/ Computer (White) 1.High quality,Assorted colors 2.Factory Price 3.Fast Delivery Bluetooth Headset for all Mobile Phone/ Computer (White) 1) Bluetooth head set lets you listen to music or take phone calls wirelessly. 2) High-quality speakers deliver crisp,rich sound. 3) Accept incoming calls or toggle vetween tracks with the touch of a button. 4) Lightweight,comfortable design for all-day listening. 5) Compatible with bluetooth enabled devices,such as most computers,cellphones,iPhone 3GS/4,iPad,iPod,and other MP3/MP4 players Earphone Specifications:Function for iPhone 4 & 4S, iPhone 3GS/3G, iPhone, iPod, MP3 fashion, precision, nice item.environmental, eco-friendly.CertificateROHS, SGS, CE.PackageBlister Packing or following customers request.Priceprovide the most competitive factory prices.Delivery timeapprox 7-10 days after sample approval.transportationSmall quantity: DHL/Fedex/UPS/TNT... Expres
Specifications The High Quality Bluetooth Headset for Iphone 1.Bluetooth stardand: V3.0 2. standby time: 60hrs 3.With BQB, FCC 4.Hot sale The High Quality Bluetooth Headset for Iphone*Working range: 10M*Talk time: 3 hrs*Standby time: 70 hrs*Charging time: less than 3 hrs*Battery: Rechargeable 60mAh Li-Polymer Battery*Charger Power: Input 100-240 V AC, Output: 5V DC Product configuration including
Specifications wireless headphone for bluetooth headphone 1.bluetooth headphone 2.earmuff bluetooth headphone 3.factory price wireless headphone for bluetooth headphone 1.Bluetooth stereo headset lets you listen to music or phone calls wirelessly2.High-quality speakers deliver crisp,rich sound3.Accept incoming calls or toggle between tracks with the touch of a button4.Lightweight,comfortable design for all-day listening5.Compatible with bluetooth enable devices,such as for phone/for ipad,most computers,cellphone6.Frequency response:20-20,000 Hz7.Speaker impedance:32 ohm8.Transfer Distance:33 FT/10M9.Frequancy:2.4GHz10.Technology: Bluetooth V3.0-EDR11.Play/Talk ~10 Hrs12.Omni-directional high quality microphone13.Easily charge via USB port14.Sensitivity microphone Ver.Bluetooth V3.0+EDRBluetooth ProfilesHSP,HFP,A2DPK,AVRCPEffective Range10MetersMusic Time10HoursTalk Time11HoursStandby TimeUp to 250HoursInputDC:5V/180mAhCharge Time3HourDimensions14.5*10*6cm
Specifications Mono headset bluetooth headphones CD-615 factory price small and exquisite Mono headset Mono headset bluetooth headphones CD-615 It is a lightweight and comfortable stereo headset with a unique design and fashionable style. It has full metal body construction and its Bluetooth ringtone answering function allows headset to ring for incoming calls. You can make a direct phone call from your headset to most recent call by its recent call re-dial function. Moreover you can just push send button for a second to hold incoming calls, push it again to get back. When you listening to music, it will let you know your incoming calls by strong vibrating (as your cell phone's) from one side. Provides up to 5 hours talk time or 200 hours standby Specification: Mono headset Bluetooth version: V2.1+EDR Bluetooth model: Hands free/ Headset/ AV/ AV PCR profile Radio frequency: 2.4GHz
Brand Name: OEM Model Number: BS020RD Style: In-Ear Communication: Wireless Connectors: micro USB,USB, micro usb Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Packaging & Delivery Packaging Detail: color box packages OEM package Delivery Detail: 20 Days Specifications 1 Wireless Stereo Bluetooth Headphones 2 Dual-Mic & Noise Filtering 3 sports wireless headphone 4 CE, FCC, RoHS appro Wireless Stereo Bluetooth Headphones BS020RDMain Features1 Dual-Mic & Noise Filtering, more clear sound2 For Mono-Stereo Use, more flexible options3 Aluminium Housing, to be noble4 Super-Slim Design, more fashion 5 With In-ear Earpiece, more popular and comfortable6 BLUETOOTH V3.0, higher version, higher tech.7 MICRO USB Universal Charging, future standardization8 CE, FCC, RoHS approval9 Supports iPhone,iPad,iPod,MSN,skype. Product SpecificationsBluetooth Specification: V3.0Bluetooth P
Brand Name: Perfectdigital Model Number: BLUEST-001 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Color: 4 Colors Compatible brand: for iPhone/IPOD/IPAD Shipping terms: DHL, UPS, EMS, Fedex,TNT,HK Post OEM: YES Packaging & Delivery Packaging Detail: Retail package Delivery Detail: 1-3 workdays Specifications 1. Top quality headphone,Stereo sound, Foldable. 2. Remote control and Noise Reduction 3. For MP3, MP4, PC, Cell phone Hot selling Foldable Stereo Wireless Bluetooth Headphones Feature: 1.Stylish design.2.Perfect fit on ear to enjoy for music.3.Various color available4.Stereo earphone with excellent sound.5.Fashional design, stereo,various color for mp3,mp4 player6.Advantage price and high quality for mass purchase.7.Beautiful pakage for your retail.
Specifications Bluetooth headset,bluetooth headphone 1. Bluetooth headphone 2. Support TF card 3. sport bluetooth headphone Bluetooth headset/bluetooth headphone Parameter and specification Bluetooth Version: V2.1+EDR Class IIFrequency: 2.4GHz-2.48GHzProfile supported: Headset and Handsfree ,A2DP and AVRCPChipset: CSROperation range: >10mTalking time: >10hoursMusic playing time: 8 hoursStand-by time: >300hoursWeight: 104g Bluetooth headphone for mobile,IPAD,IPHONE,MP3,MP4,IPOD \ Listen to music when taking sport
Brand Name: TOMO Model Number: CS1 Style: Headband Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) Packaging & Delivery Packaging Detail: ABS bag+PC Delivery Detail: 3days for sample, 7days for bulk product Specifications multi function 4 in 1 wireless bluetooth headphones 1. Sound proof; 2. Bluetooth stereo power: 28mA 3.rechargeabl battray high multi function 4 in 1 wireless bluetooth headphones 1. Sound proof;2. Bluetooth stereo power: 28mA3.Built-in rechargeabl battray 1. Sound proof;2. Support usb file transmit;3. Micro SD card up to 32GB; 4. Support LINE-IN function;5. Latest V3.0 +EDR,third version; 6. Transmit range:10m; &
Specifications Bluetooth Headset Compliant With Bluetooth Stereo 2.0 Internal Lithium-Polymer Battery Plays Above 6.5 Hrs Compliant With Bluetooth Stereo 2.0 Internal Lithium-Polymer Battery Plays Above 6.5 Hrs Connect With Bluetooth Mobile Phones To Act As Bluetooth Headset Connect With Your Home Theater Or Stereo Speaker To Listen To Music/Audio Via Bluetooth Audio Source Streaming Audio From Bluetooth Enable Devices Such As PC, Notebook, MP3 Player, Portable Media Player And Mobile Phone (MP3 Function Supported) One Button For Power On/Off And Paring, Volume Button For Volume Adjustment, Easy
Specifications CSR8645 Bluetooth Stereo Headset 1.V4.0, CSR8645 chipset 2.Support bluetooth 4.0 3.Support APT-X (lossless), AAC-LC CSR8645 Bluetooth Stereo Headset1.V4.0, CSR8645 chipset2.Support bluetooth 4.03.Support APT-X (lossless) Technical standards: CSR 8645 program supports Bluetooth 4.0Transmission distance: 10 metersDimensions: length 180mm wide 70mm thick 40mmProduct Weight: 178g (grams)Talk time: 12 hoursStandby time: 300 hoursCharging time: 2 hoursBluetooth headset features:1)beautifully trends, fashion design.2)support HFP1.6, A2DP1.2 and AVRCP1.43)Supported formats: aptx (lossless), AAC-LC, MP3 and SBC4)super power saving, use dedicated charging management, to better protect the lithium battery5)anti-jamming, strong confidentiality. Noise reduction6)Then hang up, redial, reject a call, mute function, built-in Bluetooth priority
Brand Name: hotom Model Number: hotom007 Style: Headband Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Name: Bluetooth Stereo Headset Colour: White ,Red, black charging time: 2 hours horn diameter: 40 mm transmission range: more than 10 meters output power: Class II Packaging Details:: Stardard package Packaging & Delivery Packaging Detail: Stardard package Delivery Detail: 3-4days Specifications 1)Bluetooth4.0wireless headset. 2)Compatible with all Bluetooth A2DP enabled devicce 3)Working more than 24 hours in 30 mete cool HI-FI wireless floding bluetooth headphone for mobile phone bluetooth headset specifications 1) the battery 3.7 V / 500 mah lithium-ion polymer battery2 )calls (bluetooth) about 24 hours3 )music (bluetooth) about 24 hourS 4 )charging time: 2 hours5 )frequency response: 20-20 000 hz6 )horn:32 ohrn7) horn diameter:40 mm8 )bluetooth freque
Brand Name: Songman Model Number: BT07 R Style: Headband Communication: Wireless Connectors: Bluetooth Use: Portable Media Player Function: Bluetooth Place of Origin: Guangdong China (Mainland) Usage: portable media players with bluetooth Color: different color options certificates: CE, RoHS, FCC, BQB Ear pads: ultra-soft ear pads Functions: Bluetooth, FM Radio, TF Card, Aux In Distance: 10 merters Battery: Lithium battery Working time: 8 hours Adaptor plug: stereo 3.5mm AUX IN Package: giftbox Packaging & Delivery Packaging Detail: Giftbox, window box, blister box Delivery Detail: 30 days Specifications 1. Stereo bluetooth headphone with handsfree function 2. With soft silicone handband and shinning earcovers 3. 8-hour working Features: 1.Easy to use, built-in microphone2.with or without FM radio, TF card slot3.Built-in 350am lithium battery, connect USB cable to charge Bluetooth headphones can work with bluetooth enabled devices such as mobile phone, Laptop, PC, &am
Brand Name: OEM Model Number: HBT07 Style: Headband Communication: Wireless Connectors: 3.5mm Use: DJ,studio/DJ Function: Bluetooth,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) Quality: stereo hi-fi output Interface: 3.5mm with microphone Feeling: soft to wear Color: various power: Built-in 350am lithium batter card: Built-in TF card slot radio: FM radio Certificate: CE.FCC.ROHS.6P feature: bluetooth wireless Packaging & Delivery Packaging Detail: Plastic box/piece 60 pieces / Carton Delivery Detail: about 30 days Specifications Colorful bluetooth headphone Wireless headphone Studio headphones DJ headphones CE/FCC/RoHS/6P Colorful bluetooth headphone,wireless headphone and studio headphones Features with FM radio Built-in TF card slot. Built-in 350am lithium battery, connect USB cable to charge. 1.Stereo studio bluetooth headphone2.Can connect with mp3, mobilephones and computers, etc3.Soft leather headband and earpuff, comforta
Brand Name: mpc Model Number: ST-89 Style: Headband Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Charging mode: USB and travel Frequency: 2.4GHZ spectrum Standby Time: 180 hours Warranty: 1 year (1 to 1 replacement) Packaging & Delivery Packaging Detail: neutral packing ,Carton Dimensions: 49*36*45(cm) Delivery Detail: 3-5 workig days after received the payment Specifications V2.0 35Pcs/Carton Stereo Bluetooth Headset st-89 wholesale Bluetooth Version: V2.0 Charging mode: USB and travel V2.0 35Pcs/Carton Stereo Bluetooth Headset st-89 wholesaleBluetooth Version: V2.0 Charging mode: USB and travel Bluetooth Version: V2.0Bluetooth Profile Supported: Headset,Handsfree,A2DP and AVRCPChipset:CSRStereo Music with caller ID and Pairs with two Bluetooth mobile phones simultaneouslyOperation range Class2(10m)Feature: With Superior OLED to indicatethe incoming calls,volume,battery and pairing sta
Brand Name: moshiny Style: Ear Hook Communication: Wired Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: red,blue,yellow,orange,pink,white etc type: various powered: 2AAA batteries dimensions: 10.8 x 3.3 x 7.2 inches Packaging & Delivery Packaging Detail: Original Box and contents,polybag,color box and gift box,also customized package Delivery Detail: 2-5 workdays Specifications bluetooth headphone Its all about sound Less Noise, more music with powered isolation comfort your ears good for iphone AAA quality syllable wireless bluetooth headphone , bluetooth headphone , AAA quality bluetooth headphone , wireless bluetooth headphone headphones technical Details(1)Advanced driver design for precise audio clarity (2)Extra large speaker drivers for super deep bass (3)High powered digital amplifier plays hip hop, rock, R+B and mo
Specifications 1,Fashional and innovative design; 2,super-bass sound; 3,CE,ROHS certificates. Headphones Specification:1.Hi-Fi stereo headphones. 2. Good performance 3. Powerful magnet systems and lightweight diaphragm to provide high-quality sound 4. Powerful bass and increased signal levels for modern rhythm music Advantages:1,We have over 800 workers which means we could offer you much faster delivery time;
Brand Name: MEW Model Number: WH-002 Style: Ear Hook Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) OEM: highly welcomed MOQ: 100 pcs Fuctiion: waterproof,bluetooth,noise cancelling microphone: YES League offer download: YES MP3 WMA: YES Memory power: YES Cable headset: YES Packaging & Delivery Packaging Detail: Product size:18.5*16*7cm Packing size:19*16.5*7.5cm Delivery Detail: within 3-6 days after payment arrived Specifications bluetooth headphone 1.put TF card play music directly 2.automatic FM radio function 3.colors: black. White. Red. Blue. Purple Wireless Waterproof headphones adapter1) Put TF card play music directly, and support for multiple audio format: WMA MP3... 2) Automatic FM radio function3) Recording function (according to the customization)4) Support cable headset heard that function, with a microphone5) Without electricity songs, radio memory functions6)
Specifications universal stereo bluetooth headphone with mic 1. MOQ: 50pcs 2. compatible with any bluetooth device 3. CE,FCC,RoHs and BQB Latest universal stereo bluetooth headphone with mic headset earphone handsfree for music and phone call Specifications of bluetooth: Bluetooth VersionV2.1 EDRTypeStereo headphone with internal micOperation Distance10mRange of Frequency2.4 to 2.4835GHz ISM bandSensitivity85dBPC InterfaceUSB2.0Music FormatMP3 at WMAStandby timeup to 200 hoursMusic Playing Time7 hoursNormal Charging TimeWithin 3 hoursBattery3.7V 300mA Rechargeable Li-PolymerPowerImput AC 100-240V, output DC 5V 300mARF Output Power-6dBm to 4dBmOperating temperature-10’C to +55’CSupportsBluetooth Headset, Handsfree, A2DP and AVRCP Profiles Authentication:You can be assured that our products are accredited by FCC, RoHS and CE certification. OEM is welcomed. Packing items &Delivery: 1 SETBluetooth Headset1 PCUSB1
Specifications Wireless Bluetooth Headsets for Motorcycle Helmet 1.800 meters range 2.Up to 120Km speed 3.Support MP3/4 player Wireless Bluetooth Headsets for Motorcycle Helmet Main Function: This device allows bikers to receive GPS voice instructions, communicate with the passenger on the back seat, to conduct calls on their mobile phone and listen to the music on their MP3 player. Last but not least, the device offers biker-to-biker intercom communication. This headset works with any Bluetooth equipped mobile phone. Designed and engineered for Heavy-Duty Performance. Features description: * Can be realized Bluetooth helmet headset with helmet headset 800 meters (Or 800-1000 meters) of direct full-duplex intercom; *Can be achieved automatically switching between bluetooth and cellular pho