Lunarlipes built a 5-in-1 detector that combines smoke, carbon monoxide, and combustible gas sensing into a single unit. Most home alarms cover smoke and CO separately, leaving gas leaks as a blind spot. This one plugs into an AC outlet and keeps a rechargeable lithium battery as backup, so it stays online even during a power outage.

The sensors are sensitive enough to catch rising CO or natural gas levels before they become dangerous. When thresholds are crossed, the 85-decibel alarm cuts through background noise clearly. The visual alert helps if you’re hard of hearing or have the TV turned up. It also tracks temperature and humidity, which is a nice extra for spotting mold-prone conditions or HVAC issues early.

One limitation: it operates up to 95% relative humidity, so bathrooms and steamy kitchens are fine, but direct steam exposure near a shower might trigger false alarms. For a single device that covers three major hazards plus environmental monitoring, it simplifies home safety without compromise.