Door Sensor Alarm with 4 Modes for doors, windows, and cabinets Overview A versatile door chime and alarm that adds a simple layer of protection and convenience to homes, apartments, offices, and other spaces. Four selectable alarm modes and intelligent alerts let you how the device responds to unexpected openings. Key benefits alert behavior: Choose normal alarm, continuous alarm, door closing reminder, or doorbell mode to match your security or convenience needs. Immediate deterrent: Builtin 110 dB alarm delivers a loud, attention getting sound when an opening is detected. Easier monitoring: Low battery alert keeps you informed when power is low, and the unit will automatically restore normal alarm mode after temporary changes. Simple operation: Mode selection and control are done with intuitive buttons, no complex setup required. Quick installation: Stickon installation using doublesided adhesive allows mounting on doors, windows, cabinets, or mailboxes in minutes without tools. Features Four operating modes: normal alarm, continuous alarm, door closing reminder, and doorbell mode. volume output: 110 dB alarm for effective audible warning and deterrence. Intelligent functions: low battery alert and automatic restoration to normal alarm mode after interruptions. Easy mode switching: simple button controls for fast configuration. Tool installation: attach with the supplied doublesided adhesive to most door and window frames. Suitable applications and scenarios Child safety at home: Mount on windows, interior doors, or cabinets to alert caregivers if a child opens an unsafe area. Mailbox and delivery monitoring: Install on a mailbox or package cabinet to know when mail or deliveries arrive or are accessed. Property and room security: Use on apartment entry doors, office doors, hotel rooms, garages, or storage cabinets to deter unauthorized entry and protect belongings. How it solves common problems Prevents unnoticed openings by sounding an immediate alarm when a door or window is opened. Reduces false alarms with selectable modes so you can choose continuous monitoring or a simple chime when needed. Low battery alert helps avoid unexpected downtime so the device remains reliable. Fast stickon installation removes the need for drilling or special tools, making it easy to start protecting spaces immediately. What to expect in use A compact alarm and sensor pair that can be positioned on most doors, windows, cabinets, and similar surfaces using included adhesive. Straightforward button controls to switch between the four modes and to turn the device on or off according to your preferences. Loud audible notification when an abnormal opening is detected, plus automatic to normal alarm mode when temporary changes end. This door sensor alarm provides flexible, easy to install protection for a variety of everyday use cases while offering clear alerts and simple controls to match household and small business needs.