Features:

1. 100% Brand new and high quality. 
2. Bluetooth BT 4.0 LE compliant (High Speed) 
3. Compliant with Bluetooth Version 3.0 + HS, 2.1 + EDR and 2.0 
4. Supporting Profiles: net , dial-up, fax, LAN access and headset 
5. Bluetooth Class 2, Compliant with Bluetooth Class I standard 
6. Effective Range: 20m 
7. Interface: USB compliance 
8. Simple pairing and anti-jamming design 
9. Support Wake-on-WLAN and Wake-on-Bluetooth 
10. HCI transport updates for USB and SDIO 
11. Simple pairing and anti-jamming design 
12. Rate: 3Mbps 
13. Operation System: Windows XP, Vista, Windows 7 32/64

Specifications: 

1. Version: CSR4.0 
2. Operation system: xp/vista/win7(32/64/)/win8 
3. Interface: USB compliance 
4. Sensitivity: - 86dbm 0.1 % 
5. Receiving/Sending range: 20m