The mouse pad connects to your computer through a standard USB cable and gets its power from there. The pad then creates an electrical field that interacts with the internal circuitry inside the mouse and gives it power. As a result, the mouse must be used directly on its mouse pad.
There are many versions of the wireless battery free mouse that are catered towards different end users.
NB-20 - Mini mouse meant for portability for notebook computers. The pad contains a retractable USB cord.
NB-30/NB-35 - basic office mouse. Two normal buttons, and a single scroll wheel. The difference between the 30 and 35 versions is the way they look with the 35 having a more see-through body casing.
NB-50/NB-57 - adds two more buttons and zooming functionality.
NB-70/NB-90 - Both mice contain two scrollable wheels for vertical and horizontal movement. The NB-70 has five programmable buttons, while the NB-90 has six and the 2nd scroll wheel on the side of the mouse.
NB-80 - 8 programmable buttons and a more ergonomic shape.
NB-95 - 6 programmable buttons, and an easy access second scroll wheel that allows both wheels to be controlled by one index finger.
X-708K - meant for hardcore gamers features upgraded specs for improved performance.
