【Safe and Secure】 This door window alarm can instantly detect any movement in your door or window. Now you can keep intruders out with our 100db, super-powered alarm system. It uses a magnetic sensor that is extremely reliable in any condition. Plus, you can set a chime sound to let you know whenever a window or door has been opened..【User Friendly】 Our door alarms for home security system features intuitive and easy-to-use functionality. The OFF/CHIME/ALARM switch lets you customize sound and alert preferences to your liking. Coming in a set of four, you get the coverage you need to keep your home safe..【Easy Install】 The alarm system can be easily mounted with adhesive tapes. The door alarms for kids safety can prevent children from sneaking out, and intruders from breaking in. This alarm helps ensure safety at all costs. Whether it’s your children, home, garage, mailbox or businesses - we want to help you stay secure..【Smart Design】 Once the alarm and magnet are separated more than 0.78 inches (20mm), the alarm siren keeps going until you close the door. Window alarm sensors are powered by four long-lasting LR44 batteries (included), which can be used for up to 3 years..【Peace of Mind】 This apartment security system is designed to fortify your home with an additional layer of protection. Now you can live your life knowing your home, belongings and loved ones are safe. It is the perfect solution for apartments, mobile homes, offices, hotels, garages and so much more.