This Bluetooth adapter has a transmitter and a receiver. In transmitter (TX) mode, you can plug it into non-Bluetooth devices such as TV/PC/MP3/airplane to wirelessly transmit audio to Bluetooth headsets/speakers/speakers. In Receiver (RX) mode, plug in wired speakers/headphones/car stereo to receive audio from your phone/tablet/computer via Bluetooth. The Bluetooth adapter audio uses 5.0 technology to more stable, faster and lower power consumption while providing excellent audio performance. Plug and play, the Bluetooth audio adapter supports 3.5mm AUX output. Refers to new and used televisions, set-top/cable boxes, computers, in-flight entertainment and other equipment; Using the latest Bluetooth chip and carefully designed software, the compact Bluetooth adapter is small and . Not only is it easy to carry, it also gives you a CD-like listening experience. To avoid synchronization issues, the Bluetooth adapter is equipped with a Bluetooth 5.0 chip that can reduce latency from 220 milliseconds to less than 40 milliseconds, and the Bluetooth transmitter will render fully synchronized audio and video. Charging time is about 2 hours. It can be used continuously for 15 hours after being fully . Colour:black Material:ABS Package Contents: 1 x Adapter 1 x USB cable 1 x Audio 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.