Vacancy and Commitment Indicator: Your guests are constantly on the go and others have been afraid to use the rest rooms. With this signal lock, your guest will not spend long finding where the toilet is, especiallythe room available.The Vacant (green) / Engaged (red) indicator easily shows whether the room is occupied.Premium Durable Metal Material: Made of high quality stainless steel, anti-rust, well made with smooth and wear-resistant surface.It will be applicable for door panel with thickness of 12-18mm.Convenience and Efficiency: This product is excellent for avoiding having to knock on the door when the door is closed.The Vacant (green) / Engaged (red) indicator will make it clear to everyone that the restroom is remotely occupied.No more waiting 10 minutes in front of the toilet.Wide Application: Ideal for toilets/shower stalls and bathrooms.Focus on elegant, clean and wear-resistant public places, such as: volleyball facilities, gymnastics, airports, train stations, hospitals, restaurants, shopping malls, offices and other public toilets.Useful Lock: Don't worry if the door is closed by accident.There is an emergency hole on the outside to open the locked door when it is accidentally locked.Comes with a smartly designed emergency lock switch that can be unlocked externally in an emergency.