Using Bluetooth 5.1 chip, low power consumption and stable signal. Laval clip design, spring back clip is not easy to fall when moving. It is more convenient to wear and use. Support songs up and down, cut songs, and volume adjustment. Car wireless Bluetooth, hands-free call function, navigation broadcast, music, bring you a high-definition sound quality experience. Specification: Product Name: Bluetooth audio receiver transmitter combo Interface: 3.5mm audio interface Whether it is plug and play: Plug and Play External power supply: No external power supply Transmission rate: 3 (Mbps) Effective working radius: 15 (m) Bluetooth standard: 5.1 working frequency: 20 (MHz) Material: Plastic + Metal colour: black Package Contents: 1 x receiver 1 x charging cable 1 x audio plug 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.