General description High-quality carbon monoxide detector equipped with a reliable electrochemical CO sensor for quick detection of gas leaks. The device features a light and sound alarm system to ensure the safety of your family by alerting you when dangerous levels of carbon monoxide are detected. Technical specifications Alarm sound level: 85 dB Power supply: DC 3V (2 AAA batteries, not included) Alarm response times: 50 ppm (alarm within 60-90 minutes), 100 ppm (alarm within 10-40 minutes), 300 ppm (alarm within 3 minutes) Material: ABS Sensor type: Electrochemical Detection type: Carbon Monoxide Other information Green LED indicator flashes every 40 seconds to show the device is functioning properly Red LED flashes and alarm sounds when dangerous levels of carbon monoxide are detected LCD displays CO concentration from 000-999 ppm "Lb" on the LCD indicates low battery (requires replacement)