Specifications XBT patented driver 10W, Hi-Fi level Internal microphone Bluetooth 3.0, stereo 8~20 hrs runtime , real portable XWAVE Bluetooth Speaker Echo 10/Echo 6 Hi-Fi Portable Bluetooth Speaker Official Website:WWW.XWAVE-WHITEHOTT.COM.TW Design in Taiwan Specifications : - Output: 10 Watt (5W*2) for Echo 10 ; 6 Watt(3W*2) for Echo 6 - Size: 175*92*35 mm without strap and carabiner - Weight: 240g without strap and carabiner - Frequency Response: 60Hz-20KHz - Distortion Rate: Max 1% with USB power, Max 5% with battery power. - Bluetooth: 3.0 A2DP + EDR (Stereo version), + AVRCP(remote control) - Battery: 1700mAh for Echo 10 (8~15Hrs) ; 1100mAh for Echo 6 (5~10Hrs) - Accessory: * Usermanual * Strap and Carabiner * USB power cable * 3.5mm AUX cable * Wall plug for Echo 10 only * Color available: Red, Blue, Violet (color available for bot
Specifications a.high-end bluetooth speaker b.speaker portable bluetooth c.bluetooth audio speaker d.with CE FCC RoHS High-end Bluetooth Speaker Bluetooth Audio Speaker α. Bluetooth connection is disconnected automatically after five minutes into power-saving sleep modeβ. Bluetooth AVRCP technology, remote control music playback, pauseγ. Bluetooth transmission distance of ten metersδ. Portable aluminum design ,great sound Color white, blackMaterialAluminumBatteryBuilt-in Lithium batteryBattery Capacity1550mAhFrequency response30HZ-18KHZThe standby current5-10mAS/N rate≥60dBDistortion≤10%Speaker interfaceRCArated voltage5VAudio Interface3.5mmCharger Interface5V Micro USBBluetooth ProfileA2DP +EDR,W
Brand Name: JOY Model Number: Mushroom Type: Active Use: Home Theatre,Portable Audio Player,Mobile Phone,Karaoke Player,Computer,Stage,waterproof Channels: 3 (2.1) Special Feature: Wireless,Portable,Mini Place of Origin: Guangdong China (Mainland) Material: Silicon cover + ABS plastic Surface technics: Rubber oil Bluetooth: Bluetooth 3.0 Color: black, orange, red, blue, green, pink ect Weight: 90g Speaker Size: 62*H59 mm Driver: 40mmW Voltage: DC 3.7V Package: gift box Warranty: one year Packaging & Delivery Packaging Detail: gift box Delivery Detail: 1-7 days Specifications 1.Funny portable waterproof shower bluetooth speaker 2.enable adsorb on wall and car ect 3.waterproof 4.bluetooth up to 10m Funny portable waterproof shower bluetooth speaker, enable adsorb on wall and car Features: 1. Bluetooth connect to mobile, PC,etc to play music in 10 meters. 2. Tansmission Range: up to 10m 3. With Mi
Specifications Mini bluetooth speaker for phone new mini bluetooth speaker for Mobilephone Support Answer the Phone 1.Fast delivery mini bluetooth speaker for phone new mini bluetooth speaker for Mobilephone Support Answer the Phone Features: Multifunction Connected with mobile phone or other Bluetooth devices within close distance Wireless Anti-theft/lost alarm Protects phone from losing Portable and convenient to use Small size Long standby time When connected with Bluetooth cell phone and laptop computer or other devices, if distance is beyond 3 to 5m, will make beep sound to alarm owner that cell phone or baggage is not close to him so as to avoid losingSpecification: Charge voltage: 5V DC Battery capacity: 100mA Bluetooth version: V2.1 + EDR Solution: ISSC + class 2 Constant working time: 80 hours Standby time: 150 hours Charge time: 2 to 3 hours Valid distance: 10m (alarm reminding distance is 2 to 3m, may be adjusted by software before shipment) Head dimension: 25 x 40 x
Brand Name: iShare Model Number: Bee-thover YF350 Type: Active Use: Portable Audio Player,Mobile Phone,Karaoke Player,Computer Channels: 3 (2.1) Special Feature: Wireless,Portable,Mini Place of Origin: Guangdong China (Mainland) Specifications 1.Bluetooth V3.0 2.Two NdFeB units, high-definition stereo. 3.2200mAh Battery Bee-thoven YF350 Bluetooth wirless Acoustics Output:3W×2Bluetooth VersionV3.0/Class 2Distortion ≤ 0.1%(1K/1W/5V)S/N ≥ 75dBFrequency 100Hz-18KHzSensitivity200mVAgreement A2DP/AVRCP/HSP/HFPBluetooth2.4GHz-2.483GHzTransmission10mChargeUSB DC 5V/500mABattery 3.7V/2200mAHSize155mm*100mm*80mm
Specifications NFC Bluetooth Speaker NFC Speakers Built-in Battery Microphone Bluetooth NFC Bluetooth Speaker with Built in Microphone, 2x 3 WattIntroducing: Introducing Chinavasion’s first NFC equipped portable speaker. Using Near Field Communication, connecting a NFC enabled phone to the speaker couldn’t be easier. With a simple tap against the speaker, both devices will automatically pair and blast out your favorite tunes. And don’t worry if you don’t have any devices packing NFC, you’ll still be able to connect to the speaker using Bluetooth!How To Get Prices For This Product:- Note down the Chinavasion product code [CVXD-A242]- Click the Alibaba "Contact Now"- Email us with the product codes you're interested in.- We'll reply to you with prices in one working day!------------------------------------------------------------------------------------------------ Manufacturer SpecificationsGeneral * Bluetooth: BLuetooth 3.0 +
Brand Name: OEM Model Number: YD106 Use: car shape Special Feature: Portable Place of Origin: Guangdong China (Mainland) Material: ABS logo: silk color: red, white package: gift box/customized Battery: DC5V-1000MA Power Supply: Built-in Battery, Mini USB Range: 10 meters Bluetooth Version: Bluetooth V2.1+EDR Size: 250*105*55mm Packaging & Delivery Packaging Detail: gift box/customzied Delivery Detail: 20 working days after sample confirmed(depends on stock) Specifications Bluetooth VersionaaBluetooth V2.1+EDR Frequency Responseaa20HZ-20KHZ Rangeaa10 meters SNR aa80dB Power Supply: Built-in Bat Car shape bluetooth speaker CSRResolution:RDASize :250*105*55mmColor: White BlackMaterial:ABSBluetooth Version:Bluetooth V2.1+EDRFrequency Response:20HZ-20KHZRange:10 meters SNR more than 80dBPower Supply: Built-in Battery, Mini USBBattery :DC5V-1000MAsupports bluetooth calling and hands freesupports play memories for the last musicsupports TF cardssupports FM 87.5-108MHZ
Brand Name: MayEasy Model Number: SXi-S325 Type: Active Use: Portable Audio Player,Mobile Phone,Computer Channels: 3 (2.1) Special Feature: Wireless,Portable,Mini Place of Origin: Guangdong China (Mainland) Bluetooth specification: 2.1 + EDR Output Power: 6W Impedance: 4Ω Battery: 1800mah Inner Magnetic: Support Handfree fuction: Support Indicator light: Support Working time: About 8 hours Audio cable: 350mm Prosuct size: 170x51x65mm Packaging & Delivery Packaging Detail: White + Master Carton Delivery Detail: About 20-30 days on receipt of deposit and order Specifications Top Selling Products 2013 For Wireless Bluetooth Speaker 1.Wireless bluetooth design 2.With high quality 3,Competitive price Top Selling Products 2013 For Wireless Bluetooth Speaker Specifications: Function: Item:Bluetooth SpeakerBluetooth versionV2.1+EDR Output Power 6W
Specifications 2.0 Bluetooth Speaker Bluetooth Hi-fi System Built-in Amplifier Super Bass and Power Saving FCC/CE/ROHS Fanntech Bluetooth Speaker - FT201 Wireless 2.0 Bluetooth Speaker with Woofer Radio Bluetooth Music Frequency TransmissionThis Bluetooth Speaker supports Bluetooth music frequency transmission and remote control. Features:Bluetooth Hi-fi and Super Bass SystemWireless music streaming loud volumeEngineered for exceptional clarity of soundPowerful built-in amplifier for a surprisingly loud volume without distortionCompatible with non-bluetooth devices connected through the line-in cable500 mAh high-capacity Lithium battery for up to 6 hours continuous playback(Line input up to 10 hours)Line input for wired playbackCompatible with all devices featuring bluetooth or a 3.5mm jackBluetooth protocol: 3.0 + EDRSpeaker output power : 4Ω 3WCompatible with all standard USB chargers (PC, Car, Mains)Compatible with:Bluetooth Speaker support Apple, Android and BlackBerry
Specifications Bluetooth speaker 2.Support Micro SD card 3.Ultra-simple style design 4.Build-in Lion-battery 5.Hands-free talking Bluetooth Speaker EX350 delivers stunning hi-fi audio in a portable wireless speaker so compact you won’t believe it when you hear it. Its loudness with output capacity of 85 decibels, music fills even the largest rooms. Bluetooth Speaker EX350 It is a simply the smallest, best bass sounding wireless speaker. It has the ability to produce extreme high (tweeter) and low (woofer) frequencies from a single bass. Amp up Your Music, Movies, GamesDon't let tiny computer speakers sap your sound. All your media deserves great audio, no matter what device it's played from. With EX350, you'll feel the thump of every kick drum, the room of every car chase and crowd with every buzzer-beater - bringing all your mobile media vibrantly to life. And with about 5-7 hours of continuous play.
Specifications DOSS-1661 mini wireless bluetooth speaker 1)Bluetooth,support tab,phone 2)Mini digital box 3)handsfree function 4)Portable Portable Stereo Bluetooth Speaker specification: 1.Rated power:1.5W 2.Frequency Response:80HZ-15KHZ 3.Total Harmonic Distortion:<1% 4.Signal to Noise Ratio:≥50dB 5.RF Range:10m 6.Perfect Sound quality 7.Bluetooth version:V2.1+EDR 8.Battery life time:6 hours for music ,3.7 500mAh 9.Available in colours: Yellow, Bluetooth,White, Grey 10.Product dimensions:72.6*72.6*78mm 11.Support TF Card,Iphone,Ipad and all other mobile phones with bluetooth function,such as PC,MP3,MP4 etc
Brand Name: OEM Model Number: For mobile phones Type: Passive Use: Mobile Phone Channels: Stereo Special Feature: Wireless Place of Origin: Guangdong China (Mainland) Color:: black, white, blue etc Packaging & Delivery Packaging Detail: Each piece to be a color box or OEM package. Delivery Detail: Will depend on final order qty. Specifications Stereo Sound Magic Bluetooth Speaker/Sound blaster for mobile phones Stereo Sound Magic Bluetooth Speaker/Sound blaster for mobile phones Technical DataInput: DC 5VOutput: 3.7V/ 500mAhBattery Type: AA alkaline battery x3Rated Power: RMS 2*2WPlay time: 4-5 hoursSize: L 120x W 65 X H 38mm Features: Magic Wireless Speaker Magical amplification mobile phone equipment soundDon't need any matching or any other connectors,It is compatible with iphone serials, Nokia, HTC, Samsung and any other mobile phones&nb
Specifications touch button stereo bluetooth speaker for iPad/iPhone/Galaxy Tab/smartphones *Touch-sensitive buttons *dual track touch button stereo bluetooth speaker for iPad/iPhone/Galaxy Tab/smartphones Description: KBT-A02 stereo bluetooth speaker complies with notebook computers and portable bluetooth devices, make multimedia products need not connecting cables will appreciate the stereo music with power output 2.0, the audio using bluetooth V2.1 + EDR, work in 2.4 G ISM band, with 2.1 Mbps data transfer rate, linear barrier-free transmission distance in 10 meters, perfect timbre, low degree of distortion. Support Bluetooth 2.1+EDR stereoWith 2.1 Mbps data transfer ratePower output 2.0Provide one way line in input Touch button control: Power:built-in Lithium Battery 3.7V/900MA,MINI USB charger Button function: Previous music/Long press for Volume down Play/Pause Next music/Long press for Volume up Power/Bluetooth Pairing Ins
Brand Name: OEM Model Number: GP-506 Type: Passive Use: Home Theatre,Portable Audio Player,Mobile Phone,Computer,Stage Channels: 1 Special Feature: Portable,Mini Place of Origin: Guangdong China (Mainland) color: optional certificate: CE/RoHS/FCC MOQ: 1000 pcs Loudspeaker size:: 40mm 40 OHM Output:: 5w Battery Capacity:: 900mAh Unit size:: 70DX30(in)H or 42(out) H Package:: 1pc/Acrylic box Charging time:: 1 hour Aux jack: 3.5" audio head Packaging & Delivery Packaging Detail: Acrylic box,or colored box Delivery Detail: 15days Specifications 1 bluetooth speaker 2)amazing sound effect 3)OEM color and logo 4)NFC speaker 5. fashion pop up design 2013 new and hot wireless portable strong bass NFC bluetooth speaker Breif introduction: 1.strong bass perfermance .2.Compatible with all line in audio source,MP3,Note Book PC,Gaming Devices,iPod, Mobile Phones,CD player3.Built in rechargeable Li battery4.outlook in special style,it is larruping &n
Specifications OEM SUPPLY make bluetooth speakers KD-025 5 V - USB straight charging source interface Support Micro TF card OEM SUPPLY make bluetooth speakers KD-025 Function Description>>Double horn output speakers;>>Power bank;
Brand Name: TONIKA Model Number: TA-296 Type: Passive Use: Mobile Phone,Computer,tablet pc Channels: 1 Special Feature: Wireless,Portable,Mini Place of Origin: China (Mainland) color: black and siliver Packaging & Delivery Packaging Detail: export standard packing Delivery Detail: 7-10 days Specifications waterproof bluetooth speaker Hand free function. cystal-clear sound. With emergency torch waterproof bluetooth speaker with emergency torch Function:With bluetooth speaker,AUX IN and emergency torch. With hand free function. Bluetooth version:3.0 Bluetooth c
Specifications Portable Mini Bluetooth Speaker with MP3, Support TF card 1.Excellent sound 2.Fashionable look 3.Bluetooth handsfree functio Factory supply colorful bluetooth speaker Functions:1.Built-in bluetooth 2.1+EDR wireless module.2.Bluetooth audio sound,perfect sound quality and best effect.3.10 M transmision distance.4.Support iphone,ipad and other devices with bluetooth function.5.High quality audio A2DP V1.2 Hand-free design ,answer call easily.6.Bluetooth music controlling functions.7.Built-in li-lion battery,with Micro USB interface.8.3.5 audio input jack, Support line-in function.9.Delicate design and easy to carry.10.Colorful LED flash11.Long Playing time:over 2 hours.12.Accessories:
Specifications 1.portable mini speaker 2.with fashion design hamburger shape 3.for gift and cheap 4.360-degree sound 5.colorful and OEM Specifications Mini bluetooth speaker for iphone/ipad/notebookPower supplier:DC5V Output power:3W(1KHz,THD10%)Frequency:200Hz——20KHzSignal&noise ratio≥80dBImpedance:4 OHM(Ω)Li-ion Output:3.7V~4.2V+0.05V Li-ion Input:5VLithium battery capacity:500mAhSpeaker Unit:40mmCase Material:ABSDimensions:Dia70mm*H50mm(closed resonation)Weight:90g Features: Bluetooth Li-ion battery speaker(1) Can play music by link to mobile phone,MP3,MP4,PC,IPOD and other audio devices, if you devices have 3.5mm socket. (2) Suitable for Promotion, Gift, Store for sell. Pocket size to carry anywhere (3) Charging Indicator (4) Bluetooth connect to PC/Mobile/IPOD and so on Packing details: Color box size:11.5*6.5*11cmCarton size:57.5*34*25.3CMQTY/CTN:50pcsN.W/G.W:8kg/9kg20'GP:27250pcs40'GP:58600pcs&
Specifications Wireless Mini Bluetooth Speaker *Builtin Battery *Hand Gesture recognition *MIC talk,TF card play,3.5mm input *CE,FCC Hand Gesture Recognition Wireless Mini Bluetooth Speaker Model No.: GVBS-1011 *Bluetooth speaker with Hand Gesture recognition function.*Aluminium alloy housing.*Support TF card play,3.5mm input, MIC talk. *Mini Size,600mAh built in Li-ion battery.*Color: Black,siliver,rose red,sky blue,gold yellow *Bluetooth 3.0.*Support A2DP.*Built-in Antenna.*Working Distance up to 10m.*Loudspeaker output: 4W max.*Signal Noise Ratio: 80(db) *Working power: 5V 200mA*Product size: φ65mm*H80mm *USB cable charging power.*Use for all device have the bluetoot function,such as for iphone,for ipad,smartphone,notebook ect.*CE/FCC/RoHS compliant.*Packing in gift box.
Specifications Bluetooth Speaker Portable Mini Bluetooth Speaker for iPad, iPhone, iPod, Laptop, MP3 and more Metal sense design Bluetooth Speaker for iPad, iPhone, iPod, Laptop, MP3 and more Portable Doss Wireless Bluetooth Speaker Mini Bluetooth Speaker Easy to Pair Bluetooth Portable Speakers (NO pin Needed). Patented Metal Housing that delivers low frequency resonating sound at even reduced volumes in real time.Works with all Bluetooth-enabled devices: smart phones, tablets and moreBuild in antenna mini bluetooth speakerHands free device with built-in omnidirectional microphoneIncredible sound quality in a small footprint bluetooth speakerUltra-compact Bluetooth speaker Wireless audio transmission Metal sense design With phone handsfree Portable, hanging portable
Specifications magic speaker No cable,no connector,no syncing Intreaction amplifying speakers hot sales points:1.No cable,no connector,no syncing2.mini amplifier3.Environmental material4.Soft feel5.Exquisite design near-field audio amplifying speakerUses patent interaction technology to magically amplify the audio fromthe speakers in your smart phone or digital music player;There is no need to configure any wireless settings or plug in cables,just set your device on the Boose and enjoy room filling sound. SpecificationInteraction technologyMagically Amplities SoundNo configuration requiredSupported output of 2w*2RMSSupported by most IOS&Android DevicesPowerful output of 2w*2RMS15 hours of battery powered play timeRequires 3 AA batteries not includedStays in stand by mode for up to 6 monthUSB or battery powered, c
Specifications - Support MP3 in USB/TF card - Water Dancing with music playing - Lithium battery inside - Fill water by user, bluetooth New arrival latest fountain speaker, bluetooth speaker with water dacing Welcome to enjoy our music audiovisual feast! n Product features: v Support USB flash drive&SD card&TF card reader v MP3 format decoder v With Bluetooth,enjoy wireless music world v Colorful led water dancing follow music melody v Hi-Fi system:guide you enter the wonderful Music audiovisual feast v Works with all audio sources with a 3.5mm jack v Rechargeable Lithium battery inside,USB charging&nb
Specifications Mini new design cheap portable bluetooth speaker 1.Ver2.1+EDR (Optional) 2.Support TF card 3.hand free call 4.RoHS,FCC,BQB Mini new design cheap portable bluetooth speaker *Product Description--This speaker supports any mobile device with Bluetooth function such as iPhone, iPad, Samsung Galaxy/Note/tablet etc. --You can plug this speaker to any AUX (speaker) port such as laptop/computer and it can work as wired speaker without bluetooth function. The sound quality is the same! --The speaker comes with internal mic, so it makes your hands free while you are calling. --The bluetooth can be connected easily. The latest driver model provides very reliable and solid connection between devices. --It is metallic pain so it won't leave any finger mark when you touch it. *Technical Details Bluetooth VersionBluetooth Ver2.1+EDR (Option) Transmission distanceUp to 10mWorking Tim
Specifications bluetooth speakers 1.Compatible with multimedia device 2.Compatible Micro SD/TF 3.Material:Aluminum alloy Hot selling bluetooth speakers with Aluminum alloy Specifition Built-in Lithium-ion batteryPower SupplyLithium-ion,Computer-USB-in,DC-inCompatiblemobile/computer/MP3/MP4SupportMicro SD/TFOutput3.5mm AUX in5PIN Output3WMemory PlayAuto remember the last song & play mode playedFrequency response150-18KHz,SNR:≥80dbMaterialAluminum alloy Package product size60mm*H55mmgift box size113*70*68mmNW230gGW330gcarton size33.5*13*16cmpcs/ctn10pcs,4KG
Specifications Portable bluetooth speaker ,mini Foldable Speaker;mini speaker; portable bike speaker , portable speaker Portable bluetooth mini speaker ; portable speaker , mini speakerModel: BT-014 SpecificationsBluetooth speakerModel No. : Bluetooth Speaker-BT-014Specification : Bluetooth speakerBuilt in stereo 2.0 channel output with Power output 2x2WBluetooth version: V2.1+EDR,Frequency 2.4GHz, Working distance up to 10M Wireless Characteristic : Channels -8 channels , transmission range: up to 20mWith 3.5mm audio jack , RCA Mini USB 2.0 high speed data transfer Battery type:Built-in Li-ion Battery 950 mAh OEM/ODM are welcome !MOQ:1000PCS
Specifications Best Bluetooth Speaker for iPh iPd Laptop PC 1.Mini,portable 2.Music playing Time:4hours 3.Transmission distance:10meters New Portable Best Bluetooth Speaker for iPh iPd Laptop PC Specifications: Bluetooth VersionV3.0+EDRFrequency range2.401GHz-2.480GHzFrequency response20Hz-20kHzTHDLess than 0.1%(3.7V/1KHz/1.8W)Output Power2.0WReceiver Sensitivity450mvSNR>90dBTransmission distance10meterTalking TimeAbout 6 hoursMusic playing TimeAbout 4 hoursCharging TimeAbout 2hoursOperating voltage:5VCharger PowerAC Input: 110-240VDC Output: 5VWorking temperature-20°C~60°CCharging temperature0°C~45°CBatteryRechargeable LithiumAvailable ColorBlack, Red, Silver, Blue, GoldUnit TypePiecePackage Weight0.5kgDimension44x47.5mmPackage Size6cm x 5cm x 5cm (2.36in x 1.97in x 1.97in) What’s in the boxBluetooth speaker phone x 1AC charger x1User Manual x1 &
Specifications mini digital bluetooth speaker 1.portable bluetooth speaker 2.support Hands-free Bluetooth phone 3.wireless mini speaker wholesale Hands-free digital bluetooth speaker,mini magic bluetooth speaker Features:1.Support Hands-free Bluetooth phone2. Bluetooth music player3. 3.5mm audio input 4.support car perfume 5.OEM logo acceptable The operation and function description:1. Press the pause playback, press two to call again2.Equipped with 50 ml of perfume, can add to here3.3.5mm audio input, can be easily connected to PC, MP3, MP4, mobile phone and other sources4.Mini USB for charging5.Voice, the touch of a button Product parameter:1.Speaker: 40*3W2.Built-in lithium&n
Specifications Funny doll mini bluetooth speaker: Rated power: 2Wx2 SNR 89dB Frequency response: 100-20KHZ Speaker drivers: 4 ohm Funny doll mini speaker: 1. Funny doll speaker 2.Bear shape which is very interetsing3.Compatible with MP3, Mobile, iPod/iPhone4.Powered by 2*AA battery5.Rated power: 2W×26.SNR≥89dB7.Frequency response: 100-20KHZ8.Speaker drivers: 4Ω9.Colors available: yellow,green,blue10.PACKING: color paper box11.QTY: 20PCS/CTN12.CTN size: 85×43.5×49.5CM13.N.W.: 8.0KG14.G.W.: 9.2KG
Specifications 1.Vibration Bluetooth Speaker 2.Hands-free With mobile phone. 3.Latest fashion design LF-Cup power bank bluetooth speaker with TF slot u FEATURES ² Cup style speaker,Use cup as a cavity,Standard Cup International Calibre consistent,Characteristics of DIY² Support Bluetooth stereo sound,perfect sound quality ² Support iPhone,iPad and all telephones which have Blutooth function² Support TF card² Suitable for MP3/MP4 player, computer, laptop² Power: built in Li-battery ,with micro USB interface² Mobile power supply,can be used as a temporary emergency chager,suitable for Iphone,Ipad and intelligent&
Brand Name: ZONHG Model Number: ZH-7001E Type: Active Use: Home Theatre,Portable Audio Player,classroom Channels: 2 (2.0) Special Feature: Wireless,Portable,Mini Place of Origin: Guangdong China (Mainland) power supply: AC 200V 50Hz output power: 80W (peak) frequency range: 2.400GHz-2.483GHz sensitivity: -90dB SNR: 90dB Packaging & Delivery Packaging Detail: standard packing, one set/ctn Delivery Detail: 10 days Specifications 1.wireless bluetooth speaker 2. Multimedia audio power amplification 3.can be used as multimedia player Newest Wireless Bluetooth Speaker System Brief Introduction:This system adopts the 2.4 G wireless digital communication technology, integrated design (wireless microphone, wireless receiver, power amplifier, loudspeaker).It's economical and practical. Can reduce the burdens of teachers and improve t