... .0 class2 (also compliant Bluetooth 2.1+EDR) 2.OS supported :windows 7, vista , ... KeFeatures:Bluetooth V4.0 class2 (also compliant Bluetooth 2.1+EDR)OS supported :windows 7, vista ,xpPlug ... Bluetooth low energy radio USB dongleFull speed USB 2.0 interfaceBluetooth end product Bluetooth low energy ... belt, Find me, Proximity, Generic Attribute Profile Bluetooth 2.1+EDR Support A2DP, AVRCP, DUN-GW, HSP, ...