" Product presentation This product is intelligent voice carbon monoxide gas detector, using micro-processing control, built-in voice chip, can display carbon monoxide gas concentration, using electrochemical sensors, with high stability, low power consumption, low sensitivity drift and other characteristics. It is mainly used in places where carbon monoxide leakage may occur, to detect if any carbon monoxide leaks and to ensure the safety of human life. Features Use voice prompt Adopt a high reliability electrochemical sensor Display of carbon monoxide concentration (PPM) Power supply by 1.5V * 3 battery (3 * 1.5V AAA7 battery) Low current consumption, long standby life Alarm memory function Low battery warning Sensor failure self-check function Instructions 1. Switch on for the first time Install the 3 * 1.5V AAA battery, the voice prompt "" Welcome to use the voice type carbon monoxide alarm, it detects, please wait 2 minutes "", the alarm starts to enter in the preheating state and the display shows 2 minutes count backwards. 2. Button function Press the "" TEST / RESET "" button, the LCD will display "" 888 "" ppm, the red light is on and the alarm sounds at the same time. 3. Peak record Long press "" TEST / RESET "" key to display the alarm concentration, and press "" TEST / RESET "" key to clear it. 4. Display The concentration display adopts a 3-digit LCD display with a display range of 000-999PPM. & nbsp; 5. Indicator light Under normal working conditions, the red light flashes once every 30 seconds and the red light flashes once every 3 seconds during an alarm. 6. Low battery reminder When the battery is low, the screen will display "LB" and the voice prompts "Please note that the battery is low" 7. Alarm When the detector detects that the carbon monoxide exceeds 30 ppm (according to the selected standard, EN), it will trigger an alarm and the voice prompt "" Please note that the carbon monoxide is leaking, please open the doors and windows "", and ring the alarm. At this point, you should immediately close the valve, open doors and windows to allow indoor air to circulate, and notify the relevant professionals to take care of. 8. Alarm pause (silent mode) When you come across a non-emergency situation, you can immediately press the test button and the red flashing cycle indicates that it goes into silent mode. The red light flashes once every 10 seconds to indicate that the alarm has switched to silent mode (in silent mode, press the button once, the buzzer emits a siren and the red LED flashes cyclically to indicate that the mute is released). The alarm resets automatically after 15 minutes. 9. First press the button, reinstall the battery, you can automatically change the Chinese / English voice 10. Standard Alarm Reference Materials: FR (EN50291) 50PPM 60-90 minutes 100PPM 10-40min 300PPM less than 3 min 400PPM immediately "