The body wireles mouse this could be divided. Inside was kept the cable of USB. Ci75 had the form that was thin and flat and trendy with colour outskirts orange and grey old. The USB dongle cable was kept wthin mouse, remained in to the computer and might not driver anything. Mouse this used two battery A3. Not only wireless fungtion, if battery run down you could use the USB cable and stuck to USB port. Futhermore you could use like optic mouse with the 1000dpi resolution.
Source : gadget and stuff