This 2 in 1 CO alarm & badge holder is designed to protect you from high CO levels wherever you are whilst simultaneously displaying your ID badge. The built-in audible and visual alarms will activate should CO levels rise above 20ppm
CO measurement range?0-300ppm
Accuracy +/- 5ppm to 100ppm
Operating temperature: 0-40°C
Battery life: Up to 2 years in normal operation (or >2800 hours in alarm)