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Carbon monoxide is a pesky gas that, if left undetected and untreated, can kill; the iPhone Carbon Monoxide Detector Case hopes to reduce those unfortunate incidents dramatically. It takes advantage of the fact that those who own such a smartphone rarely leave it out of their sight for long. This constant companionship is exactly what it needed to ensure people are aware of the odorless gas.

Designed by David Tyers, the iPhone Carbon Monoxide Detector Case alerts people to the presence of the gas by either vibrating, sounding an alarm or giving off a visual cue like lighting up. It is even capable of working with the phone to dial emergency numbers so people get help when they've already been poisoned.