?Widely Compatibility?This USB Bluetooth adapter has high compatibility, supports windows7/8/8.1/10/11. (Not applicable to Mac OS) .Easily download and install the driver to use, win8/10/11 driver-free, plug and play.Realtek Driver RTL8761B Chips.Backward compatible with Bluetooth 5.0/4.2/4.1/4.0/3.0/2.1. ?Ultra-Small Size?: The stylish and compact design makes the Bluetooth receiver perfect for placing on a laptop or PC without even noticing it. You can easily carry it on your laptop without blocking the USB ports next to it. ?LIGHTNING FAST DATA TRANSFER?: Get a faster-than-ever transfer rate of 3 Mbps for clean, quick connectivity anytime!Fast and further working distance than Bluetooth 5.0 Can work with maximum transfer rate up to 3Mbps and transmission distance up to 66ft/20M in open space. (Note: operational range can be affected by walls, physical obstructions and wireless interference). ?INCREDIBLE RANGE?: High performance with a frequency band of 2.402Ghz - 2.480Ghz, our PC Bluetooth adapter is designed for maximum coverage no matter what you’re working with, allowing multiple Bluetooth devices to communicate with each other. Connect up to 10 devices at once, including Bluetooth earphones!. ?BLUETOOTH 5.1 + EDR?Adapter applies the latest Bluetooth 5.1+EDR adapter, Bluetooth low energy. Engineered with the latest Bluetooth 5.1 technology featuring four times the range, two times the speed, and eight times the broadcasting capacity of older versions of Bluetooth. The anti-interference ability and stability is enhanced, and the transmission efficiency loss caused by interference in the 2.4 GHz frequency band is reduced.