Door Sensor Alarm with 4 Modes for Home and Property Protection Why you need it This compact door chime provides audible protection and reminders to help prevent unauthorized opening of doors, windows, cabinets, and mailboxes. It offers flexible alarm behavior and simple controls so you can tailor alerts to your needs and respond quickly when an opening is detected. Key features and benefits Four selectable modes: normal alarm, continuous alarm, door closing reminder, and doorbell mode. Switch modes easily using the ondevice button to match different situations. volume deterrent: builtin 110 dB alarm emits a strong sound immediately when an opening is detected, helping deter intruders and draw attention to potential security breaches. Intelligent operation: includes low battery alert so you know when power needs attention, and automatic restoration to normal alarm mode for reliable default protection after temporary mode changes. Simple installation: no tools required. Attach the sensor using the supplied doublesided adhesive, choose a suitable position on a door, window, cabinet, or mailbox, and start using it within minutes. Versatile placement: designed for use in apartments, homes, offices, hotels, garages, mailboxes, cabinets, and other locations where monitoring openings is important. Practical applications Child safety: place the sensor on cabinet doors or windows to alert caregivers if a child opens them. Mail and delivery protection: install on a mailbox to know when it is opened and reduce the risk of mail tampering or theft. Property security in temporary or rental spaces: use on apartment doors, garage doors, or hotel room entries to receive immediate audible alerts without permanent installation. Performance and usability Easy mode switching allows quick adaptation to different needs, from a onetime chime to a continuous alarm for persistent intrusion. Audible level and instant response are intended to provide a clear, noticeable warning for occupants and nearby people. Installation without tools and low battery notification simplify maintenance and ongoing use. This door sensor alarm offers straightforward, reliable monitoring for a variety of residential and small commercial settings, delivering audible alerts, easy setup, and flexible operation to help protect people and property.