Based on this product's specifications, here are some alternatives and similar models
Carbon Monoxide Detector BLOW 50-601# — plug-in household CO sensor (model 50-601#)
Summary description:
BLOW 50-601# is a carbon monoxide (CO) detector designed for household use. The plug-in CO sensor monitors indoor air for carbon monoxide and alerts occupants to dangerous levels. Suitable for installation in homes, apartments and other indoor spaces where early detection of CO is required to prevent poisoning and enable timely evacuation or ventilation.