SimpliSafe MS1 Extra Motion Sensor

Full Room Coverage - Detects motion within 30 feet. The sensor has a "field of vision" of 90 degrees, giving you a full range of coverage when placed in a corner.
Flexible Install - The sensor is shaped to stand on a shelf, adhere to a wall, or fit in a corner for maximum room coverage. Set the sensor to be active only in "away" mode (so that you won't trigger it when you're at home) or both "home" and "away" modes (for rooms that you want covered with a motion sensor while you're home).
Pet Friendly - Your dogs and cats under 50 lbs won't trigger the alarm. We've designed the sensor to be less sensitive to motion close to the ground.