FireAngel CO-9B Carbon Monoxide Alarm

Fire angel carbon monoxide alarm normally u can find this type of alarm in mainly in the United Kingdom at price 14.99£, there is various types of alarms, only carbon monoxide alarm or combined alarm co2 with fire alarm. I did some tests of the carbon monoxide detector CO-9B , and disassembled the alarm and noise test likewise.
Introduction Fireangel carbon monoxide alarm - 0:04
Alarm Noise Test - 0:31
Fire Alarm Test - 0:38
Whats Inside Carbon Monoxide alarm - 1:11
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[@mahmudraufozdol706]

It sounds the beebs with the red light when someone presses the "Test" button; does this mean that there is a dangerous level of CO in the environment? Or should we be worried only when the alarm sounds with the red light without us pressing the "Test" button?

[@Ag85mm]

I have the same question. Did you find anything?

[@hj-installations.3838]

The test button is to check that the device sounds and is in working order just like a smoke detector

[@kylekeenan3485]

You press the button to test it and see a red light, this is just a test. In real circumstances, the red light and sound will appear when you haven't pressed the button.
The green light blinking means it's working. You will get intermittent beeps when a battery needs replacing.
Always read the manual if you are unsure.