Bluetooth audio transmitter and receiver Bluetooth 5.4, chip Support Adaptive, HD, LL decoding Easily switch between transceiver modes Easily pair Bluetooth devices, automatically connect after first pairing Support up and down songs and volume control Built-in microphone, support hands-free calls Built-in 260 mAh battery, 18 hours of ultra-long battery life Can connect to two devices at the same time Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:White Material:ABS Package Contents: 1X Transmitter Receiver 1X Type C charging cable 1X to 3.5mm female 1X 3.5mm female-female adapter 1X Aircraft audio head 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.