The HT45S40 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 input specifications of 4.75 V to 5.25 V at 25 mA maximum. The device incorporates polished stainless steel shafts and encased stainless steel bearings for durability, with a tracking force of 11 grams and rated mechanical life of 5,000,000 rotations at 6 ounces of vertical force. Operating across a temperature range of -25°C to +70°C, this trackball is ideal for professional workstations, CAD applications, and extended-use computing environments where precision pointing and ergonomic design are essential.