Smoke and Carbon Monoxide Detector Combo with Sound Warning and LCD Display Battery Powered CO Smoke Alarm Detector, 4 Pack (AA Battery Not Include)

[Product Description]:
This product is an intelligent carbon monoxide and smoke combined detector, which is controlled by a microprocessor. The carbon monoxide sensor is stable and reliable, with low current consumption and small sensitivity flow. Mainly used for carbon monoxide gas leakage and fire source location to make sure personal safety.
[Features]:
1. Step one
Insert 3 pieces 1. 5V AA batteries to the detector, the buzzer will sound “di”, the detector will start to warm up, and the detector will display a 2 minute count when it starts.
2. Buttons
Press the “TEST” button, the LCD displays “CO 0ppm”, then smoke “0.00db/m”, the LED flashes, and the detector emits a continuous alarm.
3. Low battery warning
When the battery capacity is low, the red light flashes once each 10 seconds and the LCD displays “Lb”.
4. Alarm
When the device detects that the concentration of carbon monoxide gas exceeds 300 PPM, it’ll sound an alarm within 3 minutes, the buzzer will sound four times each 5 seconds, the red light will flash and the alarm will continue. When the device detects that the smoke concentration exceeds 0, right away close the valve, open the windows and doors, and then call your emergency service team of workers. 1%db/m, it’ll alarm. The blue light will flash quickly, and the buzzer will continue to sound the alarm

[High Sensitive & Quick Responsive] – Build-in electrochemical CO sensor and photoelectric smoke sensor that detects the larger particles of a smoldering fires. Straight away notifies you when dangerous smoke or CO concentration is detected whilst minimizing false alarms. It’s provides the ultimate protection from two deadly threats and make your home decoration look more concise.
[LCD Display] – Clearly indicates real-time carbon monoxide (CO) concentration in the surrounding air, When the battery capacity is low, the red light flashe time at each 10 seconds, and the LCD display “Lb”.
[Test/Silence Button] – Test / Silence button lets you test the alarm weekly, and easily to silence the alarm when false alarms occur; Alarm Volume: Loud > 85dB(A). Loud 85-decibel alarm is designed to be heard easily.
[Easy Installation & Widely Used] – CO and smoke detector combo can easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs, No hardwired need. Used for bedroom, living room and any other area with a risk of fire danger.
[Warranty and Service] – 18 months worry-free product guarantee ensures long-lasting enjoyment of your purchase.And please contact seller first after getting any questions.