LENOVO ThinkPad Essential Wireless Mouse 80008028 4X30M56887 Product Description: Lenovo ThinkPad Essential Wireless Mouse - mouse - 2.4 GHz - Campus Device Type: Mouse Connectivity Technology: Wireless - 2.4 GHz Dimensions (WxDxH): 6.108 cm x 10.6 cm x 3.3 cm Weight: 60 g Wireless Receiver: USB wireless receiver Movement Detection Technology: Optical Buttons Qty: 3 Movement Resolution: 1200 dpi Features: Right and left-handed, on/off power switch, ambidextrous design Battery: AA type Manufacturer Selling Program: Lenovo Campus Manufacturer Warranty: 1-year warranty