Receive (RX) signal and transmit (TX) signal in one, free switching, suitable for a variety of devices. Built with Bluetooth 5.4 technology, Quick response to fast transmission of Bluetooth signals. The built-in battery has a long battery life and can support up to 10 hours of use after full . This Bluetooth audio adapter is smaller and more portable. Working range up to 33ft/10 meter, not limited by wires. The actual object may have color difference due to different light or display Transmission distance:less than equal 10m Charging voltage:DC5V Charging interface: Type-C interface Battery capacity: 1000mAh Playing time:10h Material: ABS+PC colour: Black+Orange Package Contents: 1x Bluetooth adapter 1x Type-C charging cable 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.