2-Pack Intruder Door Alarms

Boost your sense of security! Hang it inside, on the doorknob, to detect door movement (sensitivity settings discern vibration, not just an opening door). Movement triggers your choice of blaring alarm sound or softer chime. Helpful at home, packable for hotel stays. PLUS: peace of mind if you’re worried about sleepwalkers, toddlers or memory-impaired elders slipping out undetected. Each uses 3 AAA batteries, not included. 2.75″ w x 5.5″ h x .75″ d.