The Responsive R-10 Carbon Monoxide Alarm is from the world’s leader in CO sensors. It’s CO sensor technology was shown to be the most reliable by the Lawrence Berkeley National Laboratory.
Solid State Infrared (SIR) - Integrated sensor and reservoir    system
Battery Operated - Operates for more than one year with    9-volt Duracell battery (included)
No False Alarms - Genetic engineering created the world’s    first biotechnology-based infrared gas senso
6-Year Limited Warranty - Warranty is backed by US-based    manufacturer
Made in the USA