Superior to other home security products, the premium white door alarm looks great inside your home. When door pressure is applied, the extremely loud 120 dB alarm helps wake/alert homeowner or renter, helps deter intruder and possibly notifies neighbors (audible up to 1,000 feet/300M away). Features a non-skid pad to prevent door from opening while alarm sounds. Ideal for bedrooms, hotels, apartments, dorm rooms, front doors, etc. No wiring needed; battery-operated (requires 1x9Vbattery). Provides battery status update with a low battery indicator.The Door/Window Alarm features an extremely loud 120 dB alarm wakes/alerts homeowner or renter, helps deter intruder and possibly notifies neighbors (audible up to 750 feet/230M away). Offers 3 adjustable settings (off/alarm/chime); chime mode is ideal to alert you when children or guests are coming and going when you are at home. No wiring needed, plus sensor mounts on either side of alarm. Provides battery status update with a low battery test button; 4xLR44 batteries included. The Mini Personal Alarm is a sleek, compact modern design keychain that attaches to backpack, purse or keys for convenient, instant access, plus greater value with built-in LED light and batteries included. The 110 dB alarm helps call for assistance in an emergency and helps deter attacker (audible up to 500 feet/150M away). Pull metal chain from device to sound 110 dB alarm. Push pin back in to stop sound and use again. Safe for children, and a self-defense option for any age.