1.Bluetooth V4.0 class2 (also compliant Bluetooth 2.1+EDR) 2.OS supported :windows 7, vista ,xp 3.Dual-mode Bluetooth fully qualified Bluetooth V4.0 specification USB ... , Proximity, Generic Attribute Profile Bluetooth 2.1+EDR Support A2DP, AVRCP, DUN-GW, HSP, HFP A2DP AVTCP, FTP, OPP, Audio-GW, FAX, BPP ...