Instruction:
1. On/Off
Press the on/off button to turn the meter on or off. Pressing the on/off key in calibration mode will return to detect mode.
2. Mode introduction
When the meter is turned on, it enters detect mode and the CO level is displayed in scanner mode. The detect mode has 4 modes (scan. max, min and hold), press the mode button to switch to different modes.
Hold: When switching to this mode, keep showingthe same level
Max: Keep scanning and showing maximum level
Minimum: Keep scanning andshowing the minimum level
Scan: Keep scanning andshowing the current level
3. Backlit button
Press the backlight button turns the backlight on and the icon would show at the same time, press again to turn off.
4. Temperature unit switch
In detect mode, press the °C/°F key to switch the temperature unit.
5. Enable/disable the auto power off setting
Press and hold button to enter auto power off setting. Monitor would shows on (enable) or off (disable) asthe function is on or off. Press the button to switch, press and hold to return.

Specification:
Material: ABS
Color: Black+Yellow
Size(LxWxH): About 135x47x25mm/5.3x1.9x1in
Measuring range: 0-1000PPM
Working Temperature: 0-50°C/ 32-122°F
Resolution:1PPM
Powered by: 3pcs x 1.5V AAA batteries (Not included)
Reaction time: <60 seconds
Automatic shutdown: Automatic shutdown after 10 minutes
Alarm: More than 200ppm
Data hold function: Yes

Package includes:
1pc x Carbon Monoxide Detector
1pc x English User Manual
POWERFUL FUNCTION: With a wide measuring range 0-1000PPM, LCD digital display, high accuracy sensor.
HANDHELD SIZE: The CO gas meter is compact and lightweight, professional designed to fit comfortable in your hand, easy to carry and operate.
EASY TO USE: CO meter detects and measures concentration levels of carbon monoxide gas.
APPLICATION: Carbon monoxide meter is widely used in petroleum, chemical, coal, metallurgy, paper, fire, municipal, telecommunications, food, textile and other industries.
PROFESSIONAL TOOL: The gas detector is a device that detects the presence of CO gases in an area, often as part of a safety system.