Privacy indicator - The door lock includes a clear open (green) / closed (red) indicator that shows whether the room is occupied, helping protect privacy and avoid embarrassing situations. Reliable locking - By turning the lever, the door locks securely to prevent unauthorized entry and enhance user safety. Material and durability - Constructed from nylon plastic, delivering robust, durable performance and reliable operation. Wide range of applications - Suitable for airports, train stations, shopping centers, and office buildings. This lock is a dependable choice for privacy in public restrooms. Use scenarios - Public transit hubs: clear occupancy indication and secure locking for restroom stalls in busy terminals. - Corporate offices: reliable privacy and quick status checks in shared restroom facilities. - Shopping centers and airports: durable construction and easy-to-verify occupancy status for high-traffic restroom environments.