Xodus Innovations HS4313B Battery Powered Wireless Home Security Door Alarm with Key Entry, White

Price: $16.89
(as of Feb 26, 2023 18:13:41 UTC – Details)

You can easily set the alarm with instant on or delay alarm options. When you open the door and the magnetic contact is broken, the alarm can be set to sound either instantly or after 12-18 seconds in the delayed mode. Most people use instant when at home and delayed when they leave.
Ultra loud 91-92 dB sounds when door opens, helps deter intruder and alert residence. Perfect for homes, apartments, garages, dorm rooms and retail businesses
Includes 2 alarm keys to arm/disarm unit
Uses 2AAA Alkaline batteries (sold separately) so no wiring is needed. A red indicator light will let you know if the batteries need to be replaced.