Window sensors are a critical part of any home security system. When cameras fail, a window sensor becomes your last line of defense. Install them on all your windows, and you will know when an ...

The YL-333 Magnetic Antitheft Alarm is an easy to install security alarm system for doors and windows. This battery-operated device works on the principle of magnetic proximity detection. It can ...

Economical circuit of an electronic alarm, notifies you when your door or window is open, is presented here. This circuit wired around the Quad 2-input NAND Schmitt trigger IC 4093 (IC1) can be ...

The sensors will cost less than $10 each and are designed to detect opening doors and windows, motion indoors and out, and leaking water. The sensors will cost less than $10 each and are designed to ...

Wireless Mini Door/Window Sensor from MaxOut™ Technology delivers the maximum allowable FCC output for maximum signal strength and transmission range. Every MaxOut wireless sensor is 100% tested for ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. We originally tested and reviewed the Ring Alarm Security ...

This holiday season, consider giving the gift of home security to your loved ones. There's an abundance of products on the market that provide an extra layer of security for any property, whether it ...

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Megan Wollerton After a ...