Smoke and Carbon Monoxide Detector 10-Year Lifespan, Dual Sensor Photoelectric & Electrochemical CO Alarm with Replaceable Battery, 2 in 1 Smoke Alarm for Home Bedroom

GiiHoo Wireless Interconnected Smoke Carbon Monoxide Detector Battery Powered, Interlinked Combination Smoke and Carbon Monoxide Detector Alarm with Digital Display, Silence Button (White-1)

GiiHoo Combustible Gas Detector, Portable Gas Leak Detector with LCD Display, Locate Sources of Methane, Hydrogen, Propane, Natural Gas, Suitable for Kitchens Mobile Caravans and Gas stoves

Portable 4 Gas Detector, Sound Light Vibration Multi-Gas Monitor Meter, Rechargeable LCD Screen Backlight -Ready to Use(Orange)