Proximity sensing no-touch unit dispenses  a pre-set length per cycle from 8" or 9" wide standard towel roll up to 800 ft. (244m) long and has stub roll capability for continuous dispensing. 12 gal. (45.4 liters) disposal capacity. Semi-recessed with stainless steel collar. Powered by internal low-voltage adapter (supplied) using 110-240VAC, 50/60 Hz and providing output of 5VDC @ 1A.