Using Bluetooth 5.1 version, the compatibility, stability and response speed are the previous version. Built-in power isolation module to filter current interference, high-definition transmission without noise. The high-performance chip rejects the delay, and the connection speed and stability are greatly improved. Directly powered by USB, no need to worry about low power and battery life. Support hands-free calling, free your hands and make driving . Product name: bluetooth receiver Main control chip: AC6956 Indicator light: blue Not connected/disconnected: flash"beep" Device name: -YP12 Software system: Bluetooth 5.1 Connection: slow flash + "beep" sound Call: built-in microphone Play: slow flash Natural - stretch length: 40--150cm Transmission distance: 10 meters USB A male power supply: DC 5V 20mA USB A public power supply standby: less than 10mA 3.5 audio output: L/R channel 20HZ-20KHZ Colour:black Material:Zinc ABS+TPE Package Contents: 1 x Adapter 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.