Door and Window Alarm for Home, Wireless Home Security Burglar Alarm, Magnetic Sensor Door Window Alarm, 4-in-1 Mode 110 dB for Garage Kids Safety Refrigerators Apartment Garage Office, Pack of 2

{"4 Alarm Modes": "General Magnetic Alarm: Triggers when door or window opens.

Constant Alarm: continues for at least 10 seconds even if door or window is closed.

Closing Reminder Alarm: Reminds to close door or window if left open.

Doorbell Mode: Emits ding-pong sound when door opens. "Low Battery Alert": "Door alarms for home security system has low consumption which battery can last longer.

With low battery warning, it will sound \u201cDu...\u201d for 0.5 seconds when the battery is low.

It will sound \u201cDu...Du\u201d twice every 30 minutes when a low battery is detected in normal operation. "Super Loud Alarm": "This door window alarm can instantly detect any movement in your door or window.

Door window anti-theft alert has up to 110lb loud alarm, scare off potential thieves effectively, also prevent children or pets going out the house without notice.

Also ideal to prompt you when elder, guests or sleepwalker are opening the door."}