Ergonomic Vertical Design, Maintains the natural position of the hand and relieves the joints, 6 buttons: Left, right, middle scrolling, dpi, forwards, backwards, Rechargeable li-ion battery (300 mAh) offers an operating time of up to 50 days with normal usage behavior, 3 DPI settings: 800, 1200, 1600 DPI, Wireless 2.4 GHz radio technology.
