Crystal casing Bluetooth usb dongle/usb adapter, class 2, operation range up to 20m, ISSC Chipset, IVT2. ... 7, Bluetooth v2.1+EDR. Bluetooth usb dongle/bluetooth usb adapter:1. Crystal casing Bluetooth USB dongle2. Operation range: 20 meters ... , white, black12. Net Weight: 7g; Gross Weight: 41g Hot selling Bluetooth usb dongle/Bluetooth usb adapter(Class 1/2)--CE,FCC, ROHS Approval