Keep track of everyone wandering through your door or scare away intruders with the Door or Window Standalone Alarm. This compact alarm can be conveniently installed without the use of tools. It’s designed to make a sound once the sensor detects a door or window opening. You can set it for a chime as people walk in, or a 120 dB alarm to scare intruders away. Improve the safety of your property with the SABRE® Door or Window Standalone Alarm. FEATURES: Siren-producing alarm for doors or windows Magnetically triggered alarm sounds when door or window is opened Reaches up to 120dB, which is audible up to 750 ft. away Includes a chime setting for use at door entry/exit Sensor can be placed on left or right side of siren for convenience Easy to install with self-adhesive pads Uses 4 x LR44 batteries (included) Low battery test button Comes in 1-pack, 2-pack, or 4-pack Model: HS-DWA