Kensington Ergonomic Vertical Wireless Mouse (K75575WW), Grey/Black

Ergonomic vertical mouse employs an angled slope to keep your wrist in an ergonomic neutral handshake position, which helps relieve soft tissue compression and improves wrist and forearm posture for better comfort and muscle support
Mouse dimensions 2.74 inches tall and 4.38 inches long
Extended lip support for your little (pinky) finger enables more smooth and comfortable movements of the larger muscle group
Wireless connectivity via 2.4GH z with a range of 33 feet/10 meters; plug-and-play USB-A nano receiver; storage compartment keeps the nano receiver safe when not in use
Four button control left click, right click, forward & back (for web page browsing); a scroll wheel provides convenient scrolling
Multiple optical sensitivity (DPI) options can be selected with the DPI button, providing accuracy in any situation; DPI settings of 800, 1200, 1600, 2000, 2400
On/Off switch and Auto-sleep function helps save battery (1 AA, included); auto-sleep enabled when not used for more than one minute, and moving the mouse wakes it up; when not used for more than ten minutes the mouse goes into a deeper sleep, and clicking a button or using the scroll wheel wakes it up; low-battery indicator light comes on when battery gets low