4 Pack Door & Window Alarm Sensors
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This set of four door and window alarm sensors offers a straightforward, no-frills approach to home security by triggering a loud 120dB siren whenever a protected entry point is opened. The sensors are easy to install without any wiring or hub required, making them accessible for renters and homeowners alike. While the lack of included batteries is worth noting before purchase, the value of getting four units in one pack makes this a budget-friendly option for basic perimeter alerting.
Key Features & Specs
| Alarm Volume | 120dB siren loud enough to alert occupants and deter intruders in most residential settings |
|---|---|
| Pack Size | Comes with 4 individual sensors, suitable for covering multiple doors and windows in one purchase |
| Power | Requires batteries (not included in the package, must be purchased separately) |
| Installation | Tool-free adhesive mounting with no wiring or smart home hub required |
| Trigger Mechanism | Magnetic contact sensor activates the alarm when door or window is opened |
| Suitable Locations | Designed for homes, offices, schools, hotels, retail stores, sheds, and garages |
| Connectivity | Standalone operation with no Wi-Fi or app integration needed |
Best for: Budget-conscious homeowners, renters, or small business operators who want a simple, no-setup entry alert system to cover multiple doors and windows without committing to a full smart security ecosystem.