The Zexmte Door Window Security Alarm is a smart and reliable wireless sensor designed to enhance home and office security with its advanced 4-in-1 multi-function system. With features including General Alarm, Constant Alarm, Time Delay Alert, and Doorbell Mode, this compact device offers complete flexibility for various applications such as doors, windows, cabinets, safes, freezers, refrigerators, apartments, offices, stores, and hotels. The 108 dB loud alarm effectively deters intruders and provides instant alerts when entry is detected, while the time delay mode allows customizable alerts (3/15/30/60 seconds), making it ideal for freezers or refrigerators. Powered by 2 AAA batteries (not included), it requires no wiring and installs easily with its self-adhesive magnetic strip. The alarm stops automatically when the door or window is closed, ensuring energy efficiency and convenience. With easy button control and no complex setup, this door and window sensor offers reliable protection for your family, children, pets, and property. The package includes one door/window alarm, a magnetic strip, double-sided adhesive tape, and a user manual for quick setup.