The Door Alarms When Opened 2-pack offers a straightforward security enhancement for any home or office entrance. Each unit generates a loud 130-decibel alert upon contact separation, providing an audible deterrent against unauthorized entry. The wide gap sensor accommodates a 1.2-inch gap between the two parts, ensuring reliable triggering even when doors or windows slightly shift. Users can select between instant alarm mode for immediate notification and delay mode for a brief pause before activation, which helps avoid false alarms when the occupant is entering themselves.

Three adjustable volume levels allow the alarm to be used in quiet or noisy environments without being overly intrusive. Low battery alerts notify when replacement is needed, and the included AAA batteries make the product ready for use straight out of the box. The construction uses durable ABS plastic with a compact profile that fits discreetly on most door frames and window frames. The adhesive mounting pads are strong yet removable, allowing installation on painted wood, metal, or vinyl surfaces without drilling.

The magnetic reed switch inside the sensor is precise and responsive, with a tested lifespan that supports many open‑close cycles. The alarm circuitry is designed for low power consumption, so the batteries last several months under normal use. The 2-pack configuration offers good coverage for a main door and a back door or for two windows in the same room. Each unit weighs only a few ounces and measures about 3 inches long, making it unobtrusive yet visible enough to deter potential intruders.

This set is suitable for apartments, rental homes, offices, dormitories, or any space where a temporary or permanent alert system is needed. The loud siren can be heard throughout the average home, giving residents time to react or call for help. The delay function is particularly useful for family members who come in at night, as it provides a short window to disarm the alarm without triggering the full sound.

The inclusion of batteries and the lack of complicated wiring or app setup mean that the system can be installed in minutes. Considering the feature set and the two units included, the price point represents a practical investment in peace of mind. The product is designed for straightforward operation, with no programming or smartphone required, making it accessible to users of any age or technical background.