The Audio Blue-tooth Adapter is mainly used for devices without Blue-tooth output, such as TV, computer, etc. The product is small and stylish, easy to use, powered by USB 5V, and can work stably for a long time. Use the latest Bluetooth 4.0 transmission technology to maintain CD sound quality. The Blue-tooth Receiver Transmitter can connect three Bluetooth peripheral sound sources at the same time, and can output at the same time. The actual object may have color difference due to different light or display Blue-tooth Version: V4.0 Receiving Distance: within 5-8 meters Charging time: 2 hours Playback Time: 4-5 hours Input Voltage: DC5V Input Current: 500MA Power Consumption: 100mw/h Colour:Black Material:ABS Package Contents: 1 x Bluetooth Audio Adapter 1 x USB Charging cable 1 x AUX cable 1 x 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.