Product overview A compact magnetic door and window alarm with four selectable modes to meet different alert needs. Simple to operate and battery powered with a clear low battery warning. Useful for home, office, mailbox, hotel rooms, garages, and cabinets. Key benefits Flexible alerting options let you choose how the device responds to openings, matching your specific security or notification needs. A 110 dB alarm provides a loud, attention getting sound to warn occupants and deter intruders. Low power consumption and a distinct low battery warning help maintain reliable operation without frequent battery changes. Easy one button operation makes mode selection and power control quick and intuitive. Main features Four operation modes: General magnetic alarm: sounds when the door or window opens. Constant alarm: once triggered, the alarm continues for at least ten seconds even if the door or window is closed. Closing reminder alarm: alerts if a door or window is left open to remind you to close it. Doorbell mode: emits a ding dong sound when the door is opened to signal arrivals. Super loud 110 dB alarm for clear notification and deterrence. Battery powered with low consumption and a low battery warning that sounds like DuDuDuDu. Simple control: press the on off button 1, 2, 3, or 4 times to select modes; press the same button to power the unit on or off. Magnetic sensor design for standard door and window installations. Performance and reliability volume output to attract immediate attention in homes and small commercial spaces. Continuous alarm option supports sustained alerts when needed. Built for low power draw to extend battery life between replacements. Suitable applications Home safety: monitor bedroom windows or patio doors to alert if opened, helping protect children and household property. Entry notification: use as a doorbell mode on apartment or office doors to announce visitors without wiring. Mailbox and cabinet monitoring: place on mailboxes, storage cabinets, or garage doors to receive immediate alerts when opened. What makes it stand out Four distinct modes cover security, notification, and reminder needs in one unit. Very loud built in alarm for clear audible alerts. One button mode selection and a clear low battery warning simplify use and maintenance. Operation notes Select mode by pressing the on off button the required number of times. Press once to power on or off. If the unit indicates low battery with the DuDuDuDu sound, the battery to restore normal operation. Compatibility Designed for doors, windows, cabinets, mailboxes, garages, hotel rooms, offices, and similar installations where a magnetic contact alert is appropriate.