Bluetooth Specification V4.0 compliant  Supporting profiles : Networking , Dial-up , Fax , LAN Access , speaker , keyboard and Headset Operation system: Windows Me/2000/XP/Vista/Windows 7  - Interface : USB compliance  - Symbol rate : 3 Mbps  - Receiving / sending range: 10-30M  - Product dimension : 22 x 15 x 7（mm)  - Sensitivity: -86dBm@0.1%  - Product chip : CSR8510  - Transmission speed : 3 Mbps  - Transmission distance : 20m  - Product interfaces : USB2.0  - Product N.W. : 3g