Features: 1. Support audio equipment with audio input for wireless audio reception and transmission. 2. Supports automatic search for connected Bluetooth devices for wireless audio transmission. 3. Built-in noise cancellation circuit, gorgeous stereo, sound quality is more pure. 4. Built-in signal enhanced transmission circuit for faster and more stable connection. 5. Compatible with dual lossless audio format. 6. Support AUX OUT. 7. The cable automatically switches the working mode of the device, which makes the operation simpler and the connection more convenient. 8. Built-in battery, long battery life. 9. Voice prompts, simple and clear operation. 10. Smart compatible for Android / IOS system and all Bluetooth audio devices. 11. The product connection is simple, no driver, no need to download APP. Specification: Protocol: A2DP, AVRCP Receiving working current: ≤ 40MA Transmit working current: ≤ 45MA Standby current: <8MA Built-in battery: polymer 300MAH Charging current : 50MA Life time: >8H Bluetooth distance: >20M (empty place) Charging method : Micro USB 5V/0.5A Output connection: 3.5MM stereo interface Input connection method: 3.5MM stereo interface Compatible: for Android / IOS system, all Bluetooth audio devices, audio devices with audio input Size: 68 * 35 * 12mm / 2.7 * 1.4 * 0.5in Weight: Approx. 75g Package List: 1 * Bluetooth Adapter 1 * 3.5mm Audio Cable 1 * Micro USB Cable 1 * Manual 1、Support audio equipment with audio input for wireless audio reception and transmission 2、Supports automatic search for connected Bluetooth devices for wireless audio transmission 3、Built-in noise cancellation circuit, gorgeous stereo, sound quality is more pure 4、Built-in signal enhanced transmission circuit for faster and more stable connection 5、Compatible with dual lossless audio format