This touchless, wall mount roll towel dispenser needs infrequent refilling and provides consistent, reliable performance. Guests will enjoy the benefits of hygienic, touch free dispensing. (4) included D-cell batteries will dispense 120,000 times on one set of batteries, equal to 60,000 hand dries. 99.9% jam-free to ensure that you never miss a hand drying occasion, minimizing risk of cross contamination. Keyless entry or key-activated spring lock, emergency feed knob, stub roll feature to minimize waste.