Features: 1.Easy to operate and can freely transmit and receive all audio signals. 2.Through the Bluetooth emission mode, you can send TV, CD player, MP3 or other audio source to the Bluetooth speaker or Bluetooth headset. 3.Support volume control and song switching to the last or next one. 4.This product is a Bluetooth device that integrates receiver and transmitter. 5.The product adopts low-latency technology, supporting real-time transmission of online games, TV and movie sounds. 6.Built-in battery, long working time, and it can be recharged and used. 7.Music can be transmitted from mobile phone to traditional home audio device through the Bluetooth receiving mode. specification:Wireless Version: 4.2 Wireless Protocol Support: A2DP and AVRCP Support Multi-format Decoding: MP3, WAV, WMA, APE, FAG Transmission Distance: Approx. 10M/32.8ft (open space) Working Time: 8H Signal-to-noise Ratio: 95b Built-in Battery: 300mAh PackageList:1 x Audio Receiver and Transmitter 1 x Audio Cable 1 x Charging Cable 1 x User Manual