NO NUMBER PAD AND EXTREMELY LOW PROFILE AIDS COMFORT. The numeric keys on the right side of a full size keyboard makes the mouse sit too far away and your right arm too extended. Eliminating the numeric keys not only saves space, but your mouse can get closer so your arm is more relaxed. The back edge is not tilted up so the entire keyboard is fully flat to eliminate the need to strain your hands upward. The key tops are only 1 cm/0.4″ off the top of the desk to further reduce wrist strain. | EXTREMELY LOW PROFILE AIDS COMFORT. The back edge is not tilted up so the entire keyboard is fully flat to eliminate the need to strain your hands upward. The key tops are only 1 cm or 0.4″ off the top of the desk to further reduce wrist strain. | TWELVE ONE TOUCH HOT KEYS AND NO Fn KEY NECESSARY. Hotkeys provide one touch operation for Undo, Cut, Copy, Paste, Web, E-mail, Computer, Mute, Volume Down, Volume Up, Sleep, and Turn Off. All functions are each accessible with one key, unlike other compact keyboards which require also pressing a Fn key simultaneously. | HIGH QUALITY SCISSOR KEYS. Precision scissor keys provide crisp action and good feedback, unlike some compact keyboards which use wobbly membrane keys that feel mushy. | WIRED PLUG AND PLAY WITHOUT DRIVER. All the hotkeys work without a driver in Windows XP or newer. The hotkeys do not work with Mac OS but all other keys work and Mac functions are printed on some keys.

Left hand model # VM4L

PREVENTS WRIST DISCOMFORT - Evoluent's ergonomic VM4R VerticalMouse 4 gently supports your right hand in an upright neutral position. The patented shape prevents you from twisting your forearm like what you usually do with an ordinary mouse. | PROGRAM YOUR MOUSE TO YOUR NEEDS - Install the Evoluent Mouse Manager onto your computer to configure the VerticalMouse's buttons. Not only can you change their function but you can also set how the buttons work within different programs. | ADJUST MOUSE-SPEED FROM LOW TO HIGH - You can adjust the pointer speed from low to high wih the optical sensor controls on the side of the mouse. There is no need to release the grip for speed adjustment. | OFFERS OPTIMUM COMFORT - The VerticalMouse 4 has a broader lip along the bottom edge that prevents the pinky finger from rubbing the desk. The thumb has been reshaped from earlier version to provide more comfort. | WIDE RANGE OF COMPATIBILITY - USB wired, and is compatible with Windows XP, 7, 8 and 10, Mac and Linux Systems