Reliable contact alarm for doors and windows: alerts you immediately when a door or window is opened, helping prevent unauthorized entry and giving you peace of mind. Battery status indicator: builtin indicator clearly shows when batteries need replacing so the alarm remains functional and you won't be caught off guard. Durable ABS construction: made from ABS material for strength, stability and corrosion resistance. The housing is sturdy and designed for longterm use in home or mobile environments. Easy, tool installation: mounts quickly with adhesive tape so you can position it on doors, windows, or frames without drilling or special tools. Wide compatibility: designed for use on most doors and windows in homes, offices, stores, garages, dorm rooms, apartments and RVs. Works wherever a simple open/close contact alarm is needed. Lowmaintenance safety: simple design with clear status indicator minimizes upkeep while providing continuous protection for everyday security needs. Typical uses: Home — place on entry doors or groundlevel windows to alert you to unexpected openings while you're asleep or away. Small business or store — install on back doors or display windows to add an extra layer of security after hours. RV or dorm room — compact, adhesivemounted alarm provides added protection when parked or when you need a temporary security solution. What it solves: Prevents unnoticed unauthorized entry by sounding an alert when a door or window opens. Reduces worry about battery failure with a visible indicator that signals when replacement is needed. Offers a quick, noninvasive installation option for renters or anyone who prefers nodrill mounting. What makes it stand out: Clear battery indicator for dependable operation. Robust ABS material for durability and corrosion resistance. Simple adhesive mounting for convenient, flexible placement across many environments.