The lid opening can be locked shut, preventing unauthorised substances from being inserted. This makes it easy to limit access to the waste area and prevent unintended uses The indicator turns red when locked The square type quarter turn lock makes it easy to remove obstructions such as chewing gum Fitted with a vibration reduction mechanism to significantly reduce wobbling and clicking sounds Soft-close functionality. Built-in damper causes lid to gently close when released, preventing slamming sounds Side plates on the plate interior prevent fingers from getting stuck or pinched when lid closes Designed for vertical use Optional inlet guide to prevent items from falling out. (Sold separately).WARNING: This product can expose you to chromium, nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.