Magnetically triggered - Alarm sounds when window or interior door is opened by kids elder & burglar ,Prevent any mishap.(entry alert activates when magnetic sensor separates) 4 Working Modes1-Instant Alarmit alarms when door opensit stops alarm when door closed2-Entry alertJust one welcome ring ding-dong 3-Door closing reminderthe sensor emits dididisound every 10 seconds until door is closed4-Instrude alarm mode (Alarm will last for 1 minute if your door is being open) 5 Adjustable volume levels (from 0 dB to 120dB) for the wireless door alarm.satisfy your need to only need LED reminder without alarm. Easy Installation- Easily mounted by adhesive, tape it on the window or door then all is done! No wiring needed! No screws needed! Completely DIY! Lifeguard for Your Family with remote: This child/home door sensor alerts when a burglar opens the door and helps deter break-ins. It also includes pool alarms for doors and door alarms for home security to provi