The Mousetrapper Prime from Mousetrapper is an inline / central pointing device that offers the convenience and flexibility of both wired and wireless operation. As with all other members of the Mousetrapper family of devices, the Mousetrapper Prime facilitates cursor control through the innovative "steering pad". Incorporating features and concepts of both a touchpad and a treadmill, the steering pad offers fingertip control for precise cursor movement, left click activation and vertical scrolling. Eight programmable buttons, plus the steering pad, provide quick access to double click, left click, right click, zoom out, zoom in, cruise (or scroll) down, cruise (or scroll) up, copy, and paste functions. All buttons and cursor speeds are also fully reprogrammable if desired.

The Mousetrapper Prime sits directly below the keyboard with the steering pad centered below the alpha-numeric keys on a standard full-size keyboard and able to be controlled by either hand. The steering pad features a slip-free silicone traction surface for the finger tips, offering near-effortless onscreen navigation and cursor control. The fingers can rest on the steering pad between mouse activation tasks, with clicking accomplished simply by pressing down against the pad. Because the fingers are physically moving the steering pad there is a much greater degree of tactile feedback than is provided by traditional touchpads, which in turn facilitates a greater degree of accuracy and control. As well, because the steering pad is not touch-sensitive there is no fear of movement disruption if additional fingers contact the steering pad - in fact, most people will naturally use multiple fingers to move the pad, making it a more natural movement than traditional touchpad control. The two-dimensional steering pad also offers an intuitive interface that for some may be easier to adjust to than rollerbars, touchpads or trackballs.

The Mousetrapper Prime features replaceable and wipeable palm supports and has an attached "keyboard support" that can be folded out to elevate low profile keyboards or folded below the Mousetrapper when using more traditional keyboards. Like most central pointing devices, the Mousetrapper Prime requires no overextension of the shoulder joint, and can significantly reduce the risk of repetitive strain injuries to the muscles of the shoulder and upper back.

In addition to the above features, the functionality of the Prime is greatly enhanced by the downloadable MT Keys software, which includes the ability to paste text up to 254 characters long using a single button and to add user profiles. MT Keys can also be used to adjust the Mousetraapper Prime cursor speed (up to 2000 dpi). The wireless mode functions via USB with the included receiver, while the rechargeable battery has six months of battery life between charges.