Are you suffering from carpal tunnel wrist Comfort shoulder fatigue tendonitis due to using traditional computer mouse? This ergonomic vertical mouse encourages healthy neutral handshake wrist and arm positions and will help you to relieve the wrist and hand Comfort.You deserve it !  Comfortable Ergonomic Design Designed for right-handed the ergonomically-designed thumb rests and grips fit the contour of your palm for maximum comfort .  The rubberized scroll wheel ensures that your hand does not slip when using the wireless mouse. The side buttons can help you move forward and backward when browsing the web Work Efficiently Five buttons give you improved control over your computers systems. Whether dragging and dropping selecting large volumes of data or casually gaming this computer mouse provides a low-cost effective solution for multiple computing needs ** Please Note: The USB receiver is stored at the bottom of the mouse Wide Compatibility Our ergonomic wireless mouse well compatible with Windows7/8/Vista/10/XP/ME/2000 Vista Linux Mac OS X 10.4 etc.  Fits for desktop laptop PC Macbook and other devices Mac OS X (The previous/next page thumb buttons are not recognized on the Mac OS X.) Package Contents 1*Ergonomic Vertical Wireless Mouse  1*Receiver x1 1*Instructions x1 Specification Button number:6 buttons Tracking System: optical Frequency: 2405MHz-2476MHz Effective distance: 10m Working voltage/current: 3V/4mA Button life: 5 million times Roller life: 1.2 million turn Product dimensions: 4.92 * 3.23 * 2.56 inches Product weight: 3.84 ouches Resolution: 800- 1200-1600 DPI Rate of return: 250Hz