The HT22R40 is a desktop trackball from the DT225 series designed for ergonomic and ambidextrous cursor control. It features non-contacting optical encoders, a 2.25-inch diameter thermoset phenolic ball, and USB 2.0 protocol connectivity with stainless steel shaft and bearings for durability. The device operates over a temperature range of -25°C to +70°C and delivers 180 DPI resolution with a tracking force of 11 grams, supporting up to 5,000,000 rotations with 6 ounces of vertical force. Its compact dimensions of 5.0" W × 5.5" D × 2.7" H and high-impact ABS housing make it suitable for professional workstations, CAD applications, and extended-use computing environments where precision pointing and ergonomic design are essential.