Based on the standard 105 key short travel keyboard, this unit combines all functions, controls and features for comfortable key input and cursor control under low light conditons as well as under normal daylight. This sealed industrial keyboard integrates a 50mm large industrial grade trackball for accurate and precise cursor control. The key legends, the key edges and the trackball contour are backlit for ease of recognition at low light. The backlight is digitally dimmable at 8 distinctive levels in order to set it to the operators' best comfort. An automatic night/day sensor controls the on/off setting of the backlight and the luminosity of the  numlock and  capslock Led’s. Several internal features warrant for a longer life of the backlighting source.