Compatible with Bluetooth 2.0/3.0/4.0/5.0/5.1 and other versions. To solve the problem the computer does not have Bluetooth function, plug in the Bluetooth adapter to connect wirelessly and realize Bluetooth transmission. Win8.1/10/11 free plug and play. Support up to 5 bluetooth devices to connect at the same time, saving the location of the USB interface to various needs of users. Mini appearance, glossy texture, easy to carry. Note: The product is suitable for windows 8.1/10/11 system. for all IOS devices, including computers, iPads and iPhones. parameter: Type: USB Bluetooth Adapter Bluetooth chip solution: ATS2851 Version: Bluetooth 5.3 Interface type: USB Transmission distance: 10M Transmission speed: 3 Mbps Working frequency: 2.4G (MHz) Color: Black Material: ABS Size: 15 x 14 x 5.5mm Package Contents: 1 x Bluetooth Adapter 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.