... /usb adapter, class 2, operation range up to 20m, ISSC Chipset, IVT2.7, Bluetooth v2.1+EDR. Bluetooth usb dongle/bluetooth usb ... casing Bluetooth USB dongle2. Operation range: 20 meters (class 2) or 100 meters (class 1)3. Carrier Frequency: 2.4-2.483GHz4. Spread ... x 18 x 10 mm11. Color: blue, red, white, black12. Net Weight: 7g; Gross Weight: 41g Hot selling Bluetooth usb dongle/Bluetooth usb ...