Let your home keep watch for you with motion sensors, door sensors that notify you when they open or close, light sensors, driveway monitoring and more. A motion sensor or motion detector can sound an alarm when motion is detected or even turn on a light as you walk in the door. know who’s coming in and out of your home and office, and even turn on the lights automatically when the door opens. Door sensors add peace of mind. Take care of the outside of your home, business and property with wireless and/or battery powered perimeter sensors. Water leak sensors will alert you instantly if your home plumbing springs a leak. If you want to take control of the temperature in your home and pool, protecting both from freezing temperatures and brutal heat then temperature sensors are the way to go. Stay fire-wise with a smoke detector and carbon monoxide alert system in your home. Smarthome has the top brands and lowest prices, guaranteed.