Equiper Chargeable Wireless Ergonomic Design Vertical Optical 2.4G Mouse Wrist Healing USB Mice Blue Chargeable mouse,bulit-in battery. 1600 DPI resolution available,for home or office use You pick the hand position that best suits you. Plug and play, compatible with Mac and PC With curved mouse ring design,contoured to hand in most natural state,to reduce hand fatigue This is a truly ergonomic mouse,vertical design,natural stretch of the wrist; arched back combined