Feature: 1. Using the newly upgraded Bluetooth-compatible 5.0 chip, data mission is more stable, wireless coverage is wider, and low-power operation, more power-saving; 2. Allows you to listen to music wirelessly, connect your mobile phone to the car stereo, and play audio wirelessly; Support call noise reduction technology, built-in power isolation module, separate noise current, clear call; 3. Allows your wired earphones and speakers with no Bluetooth-compatible function to realize wireless Bluetooth-compatible function; Support TF card playback, you can enjoy music without Bluetooth-compatible connection to your mobile phone. 4. The back clip makes it , does not fall off, convenient to carry. Automatically connect after booting. After the first pairing with the device, the device can automatically connect. 5. -capacity lithium battery, which can be fully in 30 minutes, built-in lithium- battery with 200mAh capacity with 20 hours of music time. Specification: Function: wireless signal, TF card playback Bluetooth-compatible protocol: AVRCP/A2DP/HFP/ Output port: 3.5mm audio Signal to noise : 90dB Charging time: 2 hours Battery type: rechargeable lithium battery Material: Plastic colour: black Package Contents: 1 x Bluetooth Audio Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.