If a burglar breaks a window and no sensor is around to detect it, does it make a sound? Maybe it does, maybe it doesn’t — ...

Ring sells contact sensors for $20 each, while additional motion detectors cost $30. Those with run-of-the-mill smoke detectors or carbon monoxide alarms can pair them to a listening device that ...

Pay up, and the Ring Alarm offers just about everything you ... The kit includes one motion detector and one contact sensor, (The Independent / Alistair Charlton) Despite being available in ...