Product specifications： Model: M10 Bluetooth profile: BT5. 0, AVRCP, A2DP. Range: 20 m Material: ABS. Transmitting method: red LED light Receiving method: blue LED light Output parameters: DCV5.0/2.1A Input interface: 3.5 mm Internal interface: AUX + interface Power supply: /car charger/computer charger Product dimensions: approx. 50 x 30 x 10 mm. Contents: 1 x BT5. 0 audio transmitter/receiver adapter. Product Description： Bluetooth Adapter for PC: This mini Bluetooth adapter can give you a powerful data connection Wireless Bluetooth between your Windows PC or laptop and Bluetooth devices such as mouse, keyboard, speaker, cell phone, headphones, printer. You can easily transmit images, data and files. High Speed ​​Bluetooth 5.0 Dongle: Uses the latest Bluetooth 5.0 + EDR IC chip and Bluetooth low energy technology. This mini Bluetooth 5.0 dongle can provide transmission rate up to 3Mbit and transmission distance up to 10m in open space. Plug and Play: It can be used automatically when it is plugged in, just plug in the speaker or power amplifier, and the Bluetooth can be changed to Bluetooth in seconds, eliminating the trouble of wiring, so that the computer has Bluetooth function, turning on the computer in seconds, and responds quickly without stalling. Ambient light and key control: Plug in the power and the case will display colorful ambient light. Long press for 3 seconds to freely turn on and off the colorful lights. One-key switch on/off/answer call/end call/play music/pause music. Multi-functional ： Bluetooth transmitter receiver is mini , smart and compatible, easy to carry, it can stream and navigate for you in the car, listen to songs, you can connect to TV at home, wear headphones to enjoy your world. Use it via . The interface is charging, don't worry about running out of power. luckymeet