width js-product-description Product__Description-text text-break-word"> Light and sound alarm warning: When a dangerous level of carbon monoxide is detected, the red LED flashes and the alarm model emits an 85 decibel alarm to protect your family's life and the safety of children. goods against the CO detector. Alarm standard: the alert time depends on the level of carbon monoxide concentration. 50 ppm, alert within 60-90 minutes; 100 ppm, alert within 10-40 minutes; 300ppm, alert within 3 minutes. High quality carbon monoxide detector, EN 50291 certified, equipped with a high accuracy and reliable long life electrochemical CO sensor to detect quickly CO gas leaks: Power supply: (DC3V) 2AAA size batteries.Sensor type Type Electrochemical gas detection typeCarbon monoxide Material: ABS