Model Number: Bluetooth Adapter Bluetooth version: 5.3 Frequency range: 2.4GHz (2402-2480MHz) Transmission distance: 0~20M Rated voltage: DC 5V Interface type: USB Operating system: Win7, Win8, Win8.1, Win10, Win11 (drive free for systems above Win8) Feature: 1. Support multiple devices to connect at the same time: support multiple Bluetooth-compatible devices to connect at the same time, solve the USB gap problem, and meet various occasions 2. Drive free for Win8 and above, plug and play: Win8.1/10/1 drive free, plug in to support Win7 (drive required) 3. Compatible with multiple Bluetooth-compatible versions: downward adaptation of 4.1/4.2/5.0/5.1 Bluetooth-compatible versions 4. Universal: Wireless devices such as a keyboard,mouse,speaker,printers,&more 5. Small and lightweight: Bluetooth 5.3 adapter is small, lightweight, won't take much space, easy to carry or store. Note: The USB bluetooth adapter can only be plugged into your desktop or laptop computer, and cannot be used on other devices such as a car. Q: If your Bluetooth adapter does not work (there is a driver error problem), please use the following methods to solve it. A: Since Windows 10 system has Bluetooth function which is the "Intel(R) Wireless Bluetooth" in this image, So you need to right-click to disable the Bluetooth: "Intel(R) Wireless Bluetooth" and then re-plug our 5.3 Bluetooth adapter to try, If you have other questions, you can contact our online customer service to solve the problem.