Security Door Alarm Features vibration; 100dB alarm or chime
Security Door Alarm Great for Home or Travel
You can welcome guests or discourage intruders with this unobtrusive device; it simply hangs around your doorknob and functions as you decide. Features vibration; 100dB alarm or chime; and low battery indicator light. Requires 3 AAA batteries (not included). Measures 2-3/4" x 5-1/2" x 5/8"
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