Overview The ThinkPad Essential Wireless Mouse is a compact, portable 3-button mouse. It features a 1200 dpi resolution and is comfortable for both right- and left-handed users. It connects via 2.4GHz wireless, and easily pairs by connecting the USB micro receiver to your PC. 3-button mouse (left click, right click, scroll click) Designed for comfortable use by both right- and left-handed users 1200 dpi optical sensor Battery life: 1 year Other Specifications Designed for comfortable use by both right- and left-handed users Mouse Buttons 3 (left click, right click, scroll click) Mouse Sensor Optical sensor Required Hardware PC with USB port Power Consumption 1 AA battery Scrolling Scroll wheel (up/down/left/right)