Materials: Solid polypropylene plastic to resist staining, chipping, and fading Grip Tight bumpers add stability and prevent shifting Automatic night light function to illuminate the bowl with energy saving functions Quiet Close lid to ensure a slow close that prevents slamming Quick Release hinges allow seat to be unlatched from toilet for easy removal and convenient cleaning; no tools required Dual LED Lighting guide and Task Lighting that illuminates tank and bowl via batteries without disrupting nightime vision Battery Operated No cords required (Up to 6 months of battery life, uses 4 AA batteries, not included) with an illumination Cycle Automatic 7 hour nightlight Color matched plastic hinges at a wide range of colors to let you create a cohesive bathroom design Two brightness levels: a soft glow or a brighter illumination Dimensions: 16.62 x 14.19 x 2 inches