a panic button and a device that "listens" for the audio frequencies of standard smoke/carbon monoxide detectors and sends you an alert if they sound. (Each of those devices costs around $35 apiece.) ...
From security cameras and motion sensors to smoke detectors and lights, these systems work perfectly when you're offline and even off the electrical grid. Tyler Lacoma Editor / Home Security For ...
Toy and product photographers will also enjoy enhancing their shots with a dose of fog and as it dissipates quickly it shouldn’t wake up your slumbering smoke alarms (though you are still recommended ...