About this item

• This carbon monoxide detectors/smoke alarm features a photoelectric sensor for smoke and a electrochemical co sensor for carbon monoxide,the 2-in-1 smoke carbon monoxide detector means you don't have to install two separate detectors
• A digital display for this smoke detector carbon monoxide detector combo, its real-time level of smoke or CO will be read. Smoke & carbon monoxide detector combo has a standby mode, it means the digital display will be blank and it is still working
• The carbon monoxide and smoke detector is battery operated. Once you insert the batteries, carbon monoxide alarm turns on automatically and beeps in a short time. A test button is for testing or resetting
• The fire alarm's low battery warning alerts you to replace the batteries. It will beep with red LED flashing. Alarm sound will be more than 85dB, loud enough to alert anyone in one room. Smoke and carbon monoxide will also trigger a beep with red LED flashing when smoke or CO reches their warning level
• Three LED indicator lights, when smoke detector enters its standby mode, power(green) LED will flash about every 60s. Alarm(Red LED) usually works with beep during a CO alarm, a fire alarm and a low battery mode. Fault(yellow)LED means malfunction