The SimpliSafe Motion Sensor is a compact detection unit designed for compatibility with the Gen 3 Home Security System. Its enclosure is crafted from durable, impact-resistant plastic with a matte finish that minimizes fingerprints and glare. The internal passive infrared (PIR) sensor detects changes in heat patterns within its field of view, triggering an alert when movement is identified. The sensor’s lens is engineered for a wide 90‑degree coverage angle and a range of up to 30 feet in standard indoor conditions. Power is supplied by a single CR123A battery, which under typical residential usage can deliver several months of operation before requiring replacement. The device communicates wirelessly with the SimpliSafe base station using a proprietary encrypted protocol, ensuring low‑latency alerts without interference from common household electronics. The motion sensor is designed for wall‑mount installation via an included bracket, allowing quick and secure placement in corners or hallways. Its internal circuitry includes a temperature compensation feature that reduces false triggers from gradual ambient temperature changes, such as those caused by heating or cooling vents. The sensor’s response time is calibrated to filter out very brief movements, such as a pet walking by, while still reliably capturing human‑sized motion. The build quality reflects a consistent manufacturing process, with each unit undergoing basic functional testing before packaging. The exterior of the housing features a small LED indicator that briefly flashes upon detection, providing immediate visual confirmation of operation. The device’s firmware is designed to be compatible with all Gen 3 SimpliSafe systems without requiring any additional configuration; after pairing, it automatically integrates into existing alarm zones. The motion sensor’s compact dimensions—approximately 2.5 by 1.5 by 1 inches—allow it to blend into most room aesthetics without being obtrusive. Its lightweight construction makes shipping and handling straightforward, and the included mounting hardware accommodates both drywall and wooden surfaces. The unit’s power consumption is optimized for standby efficiency, drawing minimal current when idle and activating only during detection events. For households already equipped with a SimpliSafe Gen 3 base station, adding this sensor expands coverage to previously unmonitored areas. The sensor is also resistant to radio‑frequency interference from common sources like Wi‑Fi routers and cordless phones, thanks to its shielded antenna design. While not rated for outdoor use, the sensor performs reliably in typical indoor environments with temperatures ranging from 40°F to 100°F. Its affordable pricing positions it as a cost‑effective solution for expanding a home security network. The straightforward pairing process involves pressing the base station’s learn button and triggering the sensor once; no smartphone or app is required for initial setup. Once installed, the sensor requires little maintenance beyond periodic battery checks. The white color and minimalist shape help it remain visually neutral against most wall colors.

The motion sensor delivers stable performance as a basic component of a larger alarm system, focusing on reliable detection without unnecessary complexity.