The simplehuman rectangular sensor can features multi-sense technology. It reacts and adapts to your behavior, so it won"t open unexpectedly or close before you"ve finished your task - very sensible. •Multi-sense: Our sensor adapts to your tasks. It’s touch-free technology that’s in sync with your needs. •Ready mode: The trigger zone is a focused space directly above the lid — easy to reach, but precise enough to avoid false triggers. •Task mode: Once the lid is open, the trigger zone extends to become more sensitive to activity, so the lid won’t close before you’re finished. •Stay-open mode: After 3 seconds of continued activity, the lid automatically opens wider and switches to a 30-second stay-open mode — great for longer chores. •Robust internal hinge: The strong, die-cast steel hinge is built to last, but still sleek enough to place the can right against the wall. •Robust mechanism: Slam the lid down, overstuff it, or even stop it with your hand. The clutch system will temporarily disengage to prevent any damage to the motor. •Energy efficient: Lasts up to 1 year with 6 alkaline C batteries, or use with optional simplehuman power adapter. •Easy access battery compartment: Conveniently located on the back of the can. No fumbling under the lid to change batteries. Dimensions: 12″ x 17.4″ x 25.1″.