Includes trash bag retainer ring. Uses 13 gallon trash bag liners. 11 gallon size. Removable top cover for easy cleaning. Uses D-sized batteries (not included). Automatic opening lid. Infrared sensor technology that detects movement within 10 inches. Oval shape. Warranty: One year warranty covers the lids of the infrared trash cans. Made from highest quality commercial grade 304 stainless steel. 16.2 in. W x 11.4 in. D x 24 in. H (7.5 lbs.) With advances made in the twice closing mechanism, our lids close silently and efficiently. Each trash can is battery operated and will run for more than 10,000 opening and closing cycles, before batteries need replacing. Create a germ free, odor free, bacteria free environment. There will be no cross contamination to worry about when you"re preparing chicken, meat and any other foods. Trash can fits ideally in any bedroom, bathroom, office or hotel.