LN-M3 HiFi Wireless Bluetooth 4.1 Music Receiver for Android Phones / iPhone / iPad Main Features: ?? Fast connection, stable sound quality. ?? Built-in AEC ANC chip, can eliminate echo and noise circuit. ?? Support hands free call without echo or noise. ?? External operational amplifier ensures powerful pure output. ?? Battery indicator will beep when the Bluetooth receiver is lower than 3.3V. ?? Compatible with Android phones, iPhone, iPad and all Bluetooth audio equipment. Specification Primary Features Model: LN-M3 Design: Portable Compatible with: Tablet PC,MP4,MP3,PC,Mobile phone,iPod,iPhone,MP5,Laptop Supports: Bluetooth,Hands-free Calls,Volume Control,Loudspeaker Functions: Stereo,Songs Track Connection: Wireless Interface: Micro USB,3.5mm Audio Audio Source: Electronic Products with 3.5mm Plug,Bluetooth Enabled Devices Material: Plastic Color: Black Technical Parameters Bluetooth Version: Bluetooth 4.1 Transmission Distance: W/O obstacles ??10m Other Parameters Power Source: USB,Battery Charging Voltage: 5V Charging Time: 2-3H Lasting Time: 13-15H Dimension and Weight Product weight: 0.085 kg Package weight: 0.190 kg Product size (L x W x H): 8.5 x 6.3 x 2.3 cm / 3.34 x 2.48 x 0.90 inches Package size (L x W x H): 10.5 x 10.5 x 6 cm / 4.13 x 4.13 x 2.36 inches Package Contents Package Contents: 1 x Ourspop LN-M3 HiFi Wireless Bluetooth 4.1 Music Receiver, 1 x USB Cable, 1 x 3.5mm Audio Cable, 1 x User Manual in Chinese and English