Specification: 1. Dual-mode support Bluetooth 5.0 low energy (Backward compatible 2.0/3.0/4.0) 2. Full-speed USB 2.0 interface 3. Bluetooth v5.0 specification compliant 4. 2.402-2.48GHZ ISM Band 5. Low power Consumption 6. Class II power standard, distance of 10-20 meters. 7. Support Bluetooth EDR data rate to 3Mbps 8. LED Indication: Power on,Linking,Standby, 9. System Support:Windows7,Win8,Win8.1,Win10. 10. Software Support : Realtek Driver 11.Chipset:RTL8761B 12.  Support Profile: Serial Port,Object Push,File Transfer,LAN Access,Personal Area Network,Audio Geteway, Heatset HID,Keyboard,Mouse,HCRP(Printer Cable Replacement),Bluetooth Low Energy,PIM Synchronization Profile, A2DP,AVRCP,Bluetooth low energy 13. Size:  19×17×8 mm 14. Weight: 3 g 15. Operating Temperature:-10-50℃ 16. Storage Temperature:-20-70℃ 17.Supports Devices: Bluetooth Headset/Bluetooth Keyboard/Bluetooth Mouse/Bluetooth Speaker/Mobile phone/Printer/Computers/Game Controller