2A757533F-F628-47F0-83F4-E61729135ADD6769557C-2C61-47B8-9CA2-00CAB60D0CA81004FDEC-666A-4613-9F75-F9A7E319B12DPortable Carbon Monoxide MeterUT337A5128523565.00004.0000Carbon Monoxide Meter, CO Measure Range 0 ~ 1000ppm, Max Hold, Alert Value Setup, Audible Alert, Virtual Alert, Temperature Display, Sensor Self Test, User Calibration, Display Backlight, Low Battery Indication, Autopower Off