Features: 1.Compact size, directly plugged into the USB port with home stereo system U disk to playback, and does not need any external connection, like power cable and audio cable, and the user can sit at 10 meters away, easy to wireless transfer, play and control all audio files by bluetooth. 2.Adopted Bluetooth V5.0 technology (Bluetooth EDR technology), the data transmission rate is increased to 2.1Mbps, stable wireless audio transmission, shorten transmission time. 3.Provides additional bandwidth to the Bluetooth radio, enabling Bluetooth music receivers to remember up to 6 paired devices simultaneously. 4.Compatible with all A2DP stereo bluetooth devices. 5.Transfer music to wireless audio system or car audio system with USB reading function by wireless Bluetooth. Specifications: Shell Material: ABS Weight: Approx. Color: As picture shown Size: Approx. 6X2X1cm/2.4x0.8x0.4in Bluetooth V5.0 (3.5mm-to-RCA and 3.5mm-to-3.5mm audio cables are not supported), it is input via USB interface Support A2DP Bluetooth stereo Bluetooth audio playback, answering phone functions, support for car use Plug the U card speaker into a Bluetooth speaker instantly Support USB audio, good echo cancellation effect With USB sound card function. Packing List: 1 x Audio cable 1 x Receiver 1、Compact size, directly plugged into the USB port with home stereo system U disk to playback, and does not need any external connection, like power cable and audio cable, and the user can sit at 10 meters away, easy to wireless transfer, play and control 2、Adopted Bluetooth V5.0 technology (Bluetooth EDR technology), the data transmission rate is increased to 2.1Mbps, stable wireless audio transmission, shorten transmission time. 3、Provides additional bandwidth to the Bluetooth radio, enabling Bluetooth music receivers to remember up to 6 paired devices simultaneously. 4、Compatible with all A2DP stereo bluetooth devices. 5、Transfer music to wireless audio system or car audio system with USB reading function by wireless Bluetooth.