KENSINGTON Nano Wireless Mid-Size Mouse 80004518 K72405EU Product Description: Kensington Pro Fit Mid-Size - mouse - 2.4 GHz - black Device Type: Mouse Connectivity Technology: Wireless - 2.4 GHz Colour: Black Orientation: Right-handed Dimensions (WxDxH): 6.6 cm x 10.2 cm x 3.5 cm Weight: 120 g Wireless Receiver: USB wireless receiver Movement Detection Technology: Optical Buttons Qty: 6 Movement Resolution: 1600 dpi Features: Scrolling wheel Battery: 2 x AAA type Manufacturer Warranty: 2-year warranty