Specification Product Name USB bluetooth AdapterModel BT541bluetooth Version bluetooth 5 4 EDR BLE Low Power Low Latency Transmission Distance Up to 20 meters in open environments Supported Protocols A2DP HSP AVRCP HID ACC and moreUSB Interface Supports USB2 0 3 0Operating Temperature 20 to 70°COperating System Compatibility Windows 8 1 10 11 driver free plug and play Windows 7 requires driver installation Maximum Connected Devices Up to 7 simultaneouslyFeatures 1 bluetooth 5 4 Standard Enhanced stability lower latency and low battery consumption 2 Plug and Play Instantly works with Windows 8 1 10 11 without the need for drivers 3 Multiple Device Connection Supports up to 7 devices connected simultaneously to maximize usage 4 Wide Compatibility Compatible with bluetooth 2 0 3 0 4 0 5 0 5 1 and 5 3 5 High Sound Quality Delivers CD level sound quality with 3D high fidelity 6 Memory Pairing Automatically reconnects to previously paired devices ensuring convenience 7 Extended Range Provides a stable connection up to 20 meters in open environments Package Include 1 x BT541 USB bluetooth Adapter1 x User Manual