Note: 1, 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. 2, Before using the product, please disable the Bluetooth of the computer itself, and uninstall the existing Bluetooth driver of the computer, and then install the driver of this product. Bluetooth 5.3 Dongle:Product name: USB Bluetooth adapter; Bluetooth version: 5.3 (BLE Low power, low latency) Main control chip: RTL8761BW; Transmiion distance: 20 meters (in barrier-free environment); Support protocols: A2DP,HSP,AVRCP,HID, etc. Features: 1, 5.3 Bluetooth dual-mode dual-channel, compatible with Bluetooth 2.0,3.0,4.0,5.0 and 5.1 specifications. 2, Intelligent low-power chip, RF transceiver, to provide lower latency flexible and powerful Bluetooth applications. 3, Support Ca2 Power level 20m distance (in open environment). 4, Supports Bluetooth 5.3 dual-mode specification (LMP 12.45 true Bluetooth 5.3 standard). 5, Support USB2.0/3.0 interface. 6, Supports simultaneous connection of multiple devices (a maximum of seven devices). 7, Working temperature -20 to 70, 8, Support operating system: Windows 8.1, 10, 11 (no driver, plug and play), Windows7 system can be installed driver use. Supported protocol :HFP/HSP(hands-free phone/headset)A2DP/ AVRCP(stereo music)HID/HOGP(keyboard and mouse). Android smartphones, etc Save your USB Ports Connect 5 devices simultaneously Use for Data Tranfer Transfer file instantly via connection Multiple Bluetooth Versions Bluetooth 5.3, backward compatible with 5.1/5.0/4.0 devices Up to 20M Transmiion Distance Faster and more stable transfer Bluetooth Connection Enjoy wirele life Diver-free for Win8.1 and Later Only use on Windows computer