Bluetooth specification V4.0 Compliant
Supporting profiles:Networking Dial-up Fax LAN access and Headset.
Operation system:Windows XP Vista Windows7 8 10
Interface:USB Compliance
Symbol rate:Up to 3Mbps
Receiving/Sending range:10M

Key Features:
Bluetooth low energy Radio USB Dongle
Dual-mode Bluetooth transfer
Low-power selectable 1.2 to 3.6 VI/O
Supporting Bluetooth voice date
Supporting Multi languages
WLAN coexistence interface
Some devices like BOSE or game controller may need special driver for Windows 7 
Note: Please enable hands free if you are not satisfied with the sound quality(Uncheck "Handsfree 
telephony" from the services setting on your bluetooth device -> Control Panel/Hardware and 
Sound/Devices and Printers -> select your device and right-click, open Properties, then go to 
Services tab and uncheck Handsfree Telephony)