Astrotek USB 2.0 bluetooth LED CSR 5.1 Support 10-20meters Distance Dongle Adapter for Laptop Computer Desktop The Astrotek Bluetooth 5.1 USB Dongle, Adapter for Laptop Computer Desktop, Supports Windows 7/8.1/10/11, Wireless Transfer Headphones, Mouse, Keyboard, Smartphone, Speakers. Bluetooth adapter is quite compact, you can insert it into any USB port and simply keep it there, without blocking surrounding USB ports.asy Carrying and Space Saving. LED Indication: Power on Linking Standby Backward compatible 2.0/3.0/4.0/5.0 Distance of 10-20 meters Support Bluetooth EDR data rate to 3Mbps System Support:Windows7 Win8 Win8.1 Win10/11 User Interface Input USB 2.0 Male Output 5.1 Bluetooth Wireless Band 2.402-2.48 Ghz Physical Characteristics Colour Black Distance 10-20meters Warranty 1 Year