BLUETOOTH 5.0 ADAPTER: This 5.0 bluetooth adapter integrates bluetooth reception, bluetooth transmission, TF card playback, USB in-line LED digital display, FM transmission (frequency adjustable) and key control functions.SUPPORT FM TRANSMIT for CAR: The FM transmission function is used to [upgrade] the car audio into a Bluetooth speaker, enabling wireless music listening, navigation, and hands-free phone calls with adjustable frequency.Screen Display: Unique screen design, you can choose Bluetooth headset or speaker connection. The screen will show whether the product is in TX mode or RX mode, and there will also be the name of the Bluetooth connected product. You can plug in the Bluetooth adapter directly into the USB port, or you can plug in the power adapter, which is very convenient.Transmission method: The externally input TF/signal is transmitted to the bluetooth headset or bluetooth speaker through the bluetooth of the device. (play on other bluetooth devices)BATTERY-FREE & POWERED BY USB: This bluetooth transmitter is USB-powered and has no battery, so you don't need to charge it. If your TV doesn't have a USB port, you can use any phone charger, PC USB or other 5V USB socket, then when the TV is on it will automatically turn on ("TX" "RX" blinks). When "TX" and "RX" do not flash, it means the connection is successful.Colour:blackMaterial:Plastic + MetalPackage Contents:1 x USB bluetooth transmitterOnly the above package content, other products are not included.Note: Light shooting 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.