Description
This 5-pack of UltraPro window and door alarms delivers a loud 120dB deterrent, perfect for homeowners or renters wanting an easy, affordable way to secure doors and windows.
The three-mode switch lets you choose between off, chime, and alarm, so you can use it to monitor a child's room or get a heads-up when the back door opens.
Installation is truly tool-free — just peel and stick the included double-sided tape, and each sensor runs on included LR44 batteries with a low-battery indicator.
A great value at under $4 per sensor, but keep in mind there's no app or remote control, so each alarm arms and silences individually.
Buy Suggestion
[Verdict]
Skip this five-pack if you need a true security system, but buy it for cheap, loud perimeter alerts at $2.38 per sensor.
[Pros]
The 120-decibel siren is genuinely jarring and meets the advertised spec for scaring off intruders. The three-mode switch lets you toggle between off, chime, and alarm, so you can use chime mode to monitor kids or pets without false triggers. Installation is tape-only and takes under two minutes per unit, making it a low-commitment upgrade for renters or secondary doors.
[Cons]
The double-sided tape mount is the only included hardware, so these alarms will pull off painted or textured surfaces over time and cannot be screwed into place. There is no hub, app, or remote control, meaning each unit operates independently and cannot be armed or silenced from a single point.
Skip this five-pack if you need a true security system, but buy it for cheap, loud perimeter alerts at $2.38 per sensor.
[Pros]
The 120-decibel siren is genuinely jarring and meets the advertised spec for scaring off intruders. The three-mode switch lets you toggle between off, chime, and alarm, so you can use chime mode to monitor kids or pets without false triggers. Installation is tape-only and takes under two minutes per unit, making it a low-commitment upgrade for renters or secondary doors.
[Cons]
The double-sided tape mount is the only included hardware, so these alarms will pull off painted or textured surfaces over time and cannot be screwed into place. There is no hub, app, or remote control, meaning each unit operates independently and cannot be armed or silenced from a single point.
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