3 in 1 Carbon Monoxide Detector, CO Gas Detector, CO Detector with Temperature and Humidity, Complies with European Standard EN 50291

【2 In 1 Protection】Home alarm has two built-in sensors that display smoke and carbon monoxide (CO) concentrations on a large LCD screen. This prevents it from being affected by the concentration of carbon monoxide and smoke in the surrounding air. Reminder: During testing, place the alarm in a sealed bag and test it with an appropriate amount of carbon monoxide and smoke. 【Super Alert】When the carbon monoxide content exceeds 300 ppm, an alarm will sound, the red light will flash and the buzzer will sound every 5 seconds. The valve should be immediately closed and doors and windows opened to allow indoor air to circulate. If a smoke concentration greater than 0.1% db/m is detected, an alarm will sound, the blue light will flash, and the horn will always alarm with a volume greater than 85 dB. 【Sensitive and Fast】Carbon Monoxide Smoke Detector Equipped with an electrochemical CO sensor and an advanced smoke sensor for accurate detection of carbon monoxide and smoke hazard levels, if the detected concentration exceeds the range, the product responds quickly and immediately gives you an 85dB audible alarm. Until the ambient gas quantity falls below the alarm set point. 【Ultra Low Power Consumption】Gas detector display will be in sleep mode during normal working. Only the indicator light works and the green light flashes once every 40±2 seconds. The CO detector consumes a small amount of power in standby mode and the battery standby time is six months. Also Low Battery Alert Function: When the battery is low, the red light flashes once every 10 seconds and the LCD displays "Lb".