Carbon Monoxide MeterFeatures:Easy to use meter detects and measures concentration levels of carbon monoxide gasUser protection with short-term exposure limit (STEL) alarmLow level alarm (35 ppm) and high level alarm (200 ppm)Audible and visual alarmsBacklit display with CO measurements (0 to 1000 ppm) and temperature (°F/°C )Auto-power off after 20 minutes of no usage helps conserve battery lifeIncludes carrying pouch and 4xAAA batteriesMeter is NOT intended for use as personal protection equipmentSpecifications:Height: 7-3/4" (196.9 mm)Width: 2-5/32" (54.8 mm)Overall Length: 1-29/64'' (36.9 mm)Batteries: 4xAAAAuto-Power Off: YesBacklit: YesDisplay LCDTemperature: F/CIncluded Accessories: Batteries, PouchAudible Alert: YesVisual Notification: YesWeight: 5.1 oz. (144.2 g)WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.