The vertical orientation of the body is intended to rotate the hand(s) upward and away from the "palm down" posture that traditional mousing devices require. This position can reduce or eliminate the constant tension that is placed upon the tissues and tendons of the forearm when in the common "palm down" orientation. In the picture to the right you can see how the bones of the forearm are forced to twist over each other when adopting a the palm down positioning (i.e. Pronation). This pinches the internal tissue, stretches the membranes between muscle groups, and exerts a constant tension on the tendons that run along the forearm and attached to the outside of the elbow. Over time the constant strain can cause this attachment point to become aggravated, causing the painful condition commonly known as Tennis Elbow, (by the way this is also what happens when using a traditional keyboard - a very good reason the consider finding a keyboard which can reduce pronation while keying.)

Your Penguin mouse uses an infrared (IR) laser, which is invisible to the human eye. Still having problems? Plug the other end of the charging cable firmly into your Penguin mouse – orange light should show on ‘P’ logoAs can be seen in the upper illustration to the right, when the hand is placed on the Penguin Ambidextrous Vertical Mouse the twist of the bones is eliminated, tissues are no longer pinched, and the tension along the tendons is released. The relaxed arm is now able to move the mouse with ease, and the risk of developing a serious Repetitive Strain Injury (RSI) is greatly reduced. Available in 3 sizes - see below (measure from wrist crease to tip of middle finger for correct size) The idea behind the Penguin mice is to enable users to use both their right and left hands to share the workload and minimise overuse of one hand. The Penguin mouse is also perfect for hot-desking by enabling both left and right handed users to share the same desk and utilise the ergonomic benefits of the mouse. To choose the correct one for you, measure your hand from the first crease on your wrist to the tip of your middle finger. SMALL

If the cursor does not move, then retry step 3 and plug the Penguin USB cable into a different USB port on your computer Available in 3 sizes of both wired and rechargeable wireless versions, the penguin mouse will suit the hands of almost anyone. Penguin Ambidextrous Vertical MouseFeatures The upright design of the Penguin mouse encourages thenatural 'handshake' position in the forearm to prevent forearm twisting and avoids exaggerated movements in the wrist. Using the larger muscle groups of the shoulder to move the mouse, Penguin mice help to alleviate common muscular injuries caused by traditional mouse use.