5 Pack Smoke Detector and Carbon Monoxide Detector Battery Powered with Test/Reset Button, 2 in 1 LCD Display Carbon Monoxide & Smoke Combo Detector CO Alarm with LED Light Flashing Sound Warning -
AJ-933 Standalone Smoke And Carbon Monoxide Detector (2-in-1) With10-Year Tamper-Proof Battery - SAFE-TECH - A British Brand Specialising in Home and Safety Protection
How to Reset a Carbon Monoxide Alarm and When to Do It