The Penguin mouse is a breakthrough in the use of stick vertical mice. It uses the fingers rather than the thumb on the click buttons. Scroll wheel when pressed can lock or unlock to scroll. It is a stick mouse for left and right use and is ideal for switching hands throughout your day. The central “bow tie” switch allows easy transition from one hand to the other. Because it is ambidextrous it is the only vertical left hand wireless mouse available with built-in palm support.
 
Ergonomic slanted operating position is achieved with vertical use. Your hand can rest comfortably alongside the vertical grip without rubbing on the work surface. 3 sizes (see below). Precision laser with 400, 600, 800, 1200 dpi settings. In wired and wireless. Wireless model can recharge while in use. It will track accurately on typical work surfaces.
 
Which size is for you? Measure from the first crease on your wrist to the tip of your middle finger.
Small   (0 to 160mm)  Medium  (160mm to 180mm)  Large   (180mm +)