Grip-Tight installation hardware makes it easy to fasten the replacement toilet seat and toilet seat cover – everything is done from above the bowl ReadyLatch hinge on KOHLER toilet seats provide a positive lock/unlock latch to securely hold seat in position yet it easily removes for cleaning or adjusting fit Grip-Tight bumpers hold it firmly in place Toilet nightlight intensity designed to provide enough illumination to see the toilet without disrupting nighttime vision. Choose between three brightness levels: a soft glow or brighter illumination Dual LED lighting in toilet seat offers guiding light when lid is down and task light when lid is lifted. Illumination cycle with automatic 10-hour nightlight Battery-operated LED toilet bowl light - no electrical cords required. Up to 6 months of battery life (uses 4 AA batteries, not included)