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1. When the alarm is in the off-screen state, the green LED will flash
once every 15 seconds, indicating that the alarm is in normal
state.
2. When the alarm detects that the CO concentration exceeds
50PPM, the LCD screen lights up, indicating that it has entered
an alarm state.
3. When the alarm detects that the CO concentration exceeds
300PPM, the LCD screen lights up, the red light flashes and an
alarm sounds, indicating that it has entered an alarm state.
LCD screen display instructions:
‘Err’ on the LCD to indicate the unit is malfunctioning.
‘Lb’ on the LCD to indicate it low battery and need replacement.
‘999ppm” on the LCD to indicate CO level over 999ppm.
If the CO leakage is less than 999ppm but over 30ppm, it would
show its actual concentration.
LED status description：
Green LED:
The green LED flashes every 15 seconds to indicate the unit is
operating properly.
Red LED:
When a dangerous level of carbon monoxide is detected the red
LED will flashes and the alarm pattern will sound.
What To Do IF The Alarm Sounds
If alarm sounds:
1. Call your emergency services.
2. Immediately move to fresh air – outdoors or by an open door/
window. Do a head count to check that all persons are accounted
for.
Never restart the source of a CO problem until it has been fixed.
Note:
1. Don’t press test/reset button while installing batteries.
Otherwise, the unit will not work.
2.The unit needs to be tested weekly. Verify the unit’s alarm and LED light operation by pushing the test button once a week.
Package included:
2x Alarms
4x Screws
1 x User Manual
TARAS HRYCENKO
Reviewed in the United States on March 2, 2025
Happy With My Order
RJ
Reviewed in the United States on February 5, 2025
I like the price and the size. Haven’t had any trouble with it.
Chris
Reviewed in the United States on February 18, 2025
Small compact air quality gage.
NorthGeorgia
Reviewed in the United States on February 13, 2024
Be advised......they are SMALL. But if they do what they are intended that's fine. I chose to use velcro to attache to wall; works fine. The Blue light does seem to flash every 15 seconds so one can assume it is working? I will assume they are doing their job so will recommend.
frank Hinde
Reviewed in the United States on November 17, 2024
Inexpensive detectors and they went off when I put them in the exhaust stream of my diesel tractor so one assumes they are working correctly.
JeffNJ
Reviewed in the United States on August 18, 2023
Traveling with these to Mexico made us feel so much better after hearing about hotels that may have issues. They are light and easy to pack. I tested them before we left to make sure they worked and had them in our room the while trip.Only issue was one package seemed to have been opened, or severely damaged upon receipt. It was likely a return. The initial set up was already done, but ti worked so I kept it and we were leaving for our trip so no time to return/exchange it.
MJC
Reviewed in the United States on July 30, 2023
These are lightweight and will travel well. The setup is easy. One is missing a battery back or it would have received 5 stars.
Divedog
Reviewed in the United States on April 26, 2023
This thing is about 2.5"x 2.5" . It's smaller then a old time beeper we wore. Weighs about 20 grams. Not sure? But pretty sure a cricket is louder than alert alarm. Luckily I have other monitors in house, this was brought to be in living room near fireplace. That's a pic of it under smoke detector.
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