Product name: usb bluetooth FM transmitter Product model: FM01 Working voltage: 5V Effective probability: within 10 Default frequency: 95.0MHZ Signal to noise : greater or to 95db Answer the call: support Automatic return: support Power supply mode: usb power supply (5V) This product is mainly used in in-vehicle scenarios, using the latest Bluetooth 5.0 technology and mature FM frequency modulation technology to allow car fans to easily enjoy in-vehicle wireless music. colour: black Material: ABS Package Contents: 1 x FM Transmitter Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.