iView 7.5 inch Exclusive Touchless Electronic IR Sensor Roll Towel Dispenser Black. Electronic IR sensor touchless dispenser improves hygiene and reduces the risk of cross contamination. Compared to a standard sensor the IR sensor on the 51245IRB. Is not affected by stainless steel. Is not affected by stray voltage. Is not affected by wiring in the wall. Is less sensitive to moisture. Advertising window for customizable print insert or leave empty for easy paper viewing. Towels are dispensed automatically when hands are placed naturally below the dispenser. Allows the user to choose a 9in, 12in or 15in sheet size when dispensed. Longest battery life in the industry with up to 75,000 cycles or 2 years. Comes with (4) D Batteries. Two unique lock outs. System fits Merfin 7.5 inch HRT item no. 7850W, 7850T, and 7850N. Controlled dispensing system