This product is good solution to enable your computer connect with smartphone‎,‎ tablet or other Bluetooth device‎.‎ Easy installation‎,‎ convenient to use‎.‎ Product Details‎:‎ Up to 20m‎-50m transmission distance ‎(‎ non‎-blocking ‎)‎‎,‎ signaling strong‎.‎ Bluetooth 4.0 vision‎,‎ up to 30 Mbps transfer rate‎.‎ Using CSR8510 chip‎,‎ compliant with the Bluetooth 4.0 specification‎,‎ dual‎-mode transmission‎.‎ USB2.0 interface‎,‎ more versatile‎,‎ ultra‎-portable portable mini stature‎.‎ Backward compatible with Bluetooth 2.0‎,‎ Bluetooth 2.1‎,‎ Bluetooth 3.0 specification‎.‎ Compatible Operating System‎:‎ Windows 2000‎,‎ XP‎,‎ Vista‎,‎ Win7 32bit‎,‎ Win8 64 bit‎.‎ Supporting profiles are networking‎,‎dial‎-up‎,‎fax‎,‎lan access‎,‎ and headset‎.‎ Size‎(‎L x W‎)‎‎:‎23mm x 18mm/0.90‎"‎ x 0.71‎"‎ ‎(‎Approx‎.‎‎)‎