CSR4.0 Bluetooth adapter Specifications– Bluetooth Specification Class 1 v4.0 with low energy technology– High speed transfer rates of up to 3Mbps and a range of up to 33 feet– Compatible With Windows10/7/8/Vista/XP– Plug and play -Full Speed USB2.0 Interface -Bluetooth 2.1+EDR support A2DP/AVRCP/DUN-GW/HSP/HFPA2DP/AVTCP/FTP/OPP/Audio-GW/FAX/BPP. -RoHS Compliant CE/FCC.