• Ergonomic pocket size housing
• One button operation
• Easy to read 1999 count backlit displays CO levels from 0 to 1000ppm
• Audible alarm starting at 35ppm with continuous beeping when above 200ppm
• Backlight for low light conditions
• Max Hold and Data hold buttons
• Auto Power off
• Complete with 9V battery, protective rubber holster, and carrying case
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