The Detex Battery Operated Door Prop Alarm is designed for applications where doors may be used but not held open. The door prop alarm sounds when a door is left open longer than the set time and ...

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 ...

Remo+, formerly known as Olive & Dove, is back with a new DIY home security device: the DoorCam. The DoorCam is a $199 battery-powered door-mounted outdoor camera. Available for preorder on the Remo+ ...

This bundle that includes the Ring Alarm 8-Piece Kit, the Ring Outdoor Cam Plus, and the Ring Battery Doorbell is on sale from Amazon at 40% off.The Latest Tech News, Delivered to Your Inbox ...

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 ...