Description: A device that receives and transmits two in one, is free to send and receive all audio signals. Through the product receiving mode, the music in the mobile phone can be transmitted to the traditional home audio device. Through the product transmitting mode, the TV, CD player, MP3 or other audio source can be sent to the speaker or the headset. Low-latency technology supports real-time transmission of online games, TV, and movie sounds. Built-in rechargeable battery, long battery life, perfect solution to the limitations of audio equipment, extended a variety of audio device transfer function. Specification: version: 4.2 protocol support: A2DP and AVRCP Support multi-format decoding: MP3, WAV, WMA, APE, FLAC Transmission distance: >20M (empty place) Charging input voltage: DC 5V Power supply: 3.7V Low power consumption: Play less than 20 mA, connect standby 0.6-4.5 mA, shut down within 2 microamps Working time: about >10H Charging time: about 2H Signal to noise ratio: 95db or more Package Includes: 1 x 2-in-1 Adapter 1 x 2-in-1 Audio Cable 1 x 3.5mm Audio Cable 1 x USB Power Cable 1 x Manual