This alarm can be activated on the refrigerator door or drawer to help you monitor the opening and closing status of the refrigerator door. In the refrigerator, stick it on the refrigerator door to keep the door open for a long time, saving electricity. Emits a certain level alarm when outside the allowed distance. In this way, you better protect the food from spoiling or being eaten by children. Installing this siren is as simple as plugging it in with the included double sided content. This alarm can also be used as a baby room door monitor, so be sure to monitor your baby's safety and watch out for safety. When the baby's room door opens, an alarm will sound to warn parents about the baby's condition. It can be used to monitor children's activities, such as kitchen cabinets, windows, etc., to help improve children's activities and prevent accidents. Decibel: 130dB Standby time: about 1 year Alarm device size: 65*34*16.5mm Magnet Size: 36*10*14mm three regulatory standards use and use the SET button Three different types are different from different levels Burglar alarm emit one beep sound after constant constant It will alarm when the door/window opens and the alarm stops when the door/window closes doorbell Emit two beeps after constant adjustment It will make a ding dong sound when the main engine is separated from the Magenict belt alarm 30 seconds Emit three beeps after constant adjustment it will emit a siren sound for 30 seconds when the main motor is separated from the magenict belt DI DI Burglar alarm Emit four beep sounds after constant adjustment it will alarm when the main engine is separated from the magenict belt and the alarm stops, the main engine will be close delay mode emit five beeps when the controller is started. Short press the SET button or turn off the power switch to make the sound audible open the door for 15 seconds, the alarm will be activated, the alarm sound lasts 30 seconds; open the door and close it within 15 seconds, the alarm will not be activated