LuguLake Vertical Ergonomic Mouse Optical Mice, Wired, Right Hand Stress Relieving Black Ergonomic Design: The healty oriented mouse reduces stress, pain or uncomfort to the utmost in wrist and plam positions 1000 DPI Resolution Technology: Brings more sensitivity, preciser tracking and smarter responsiveness Keystroke lifetime: 8 million times. Size is bigger than usual computer mouse, USB wired connection Standard USB 2.0 cable length: 4.43 ft, product weight: 5.3 oz What you get: 1 Lugulake ergonomic vertical wired mouse, 24 -hour response customer service