The ET110 CO Detector is an easy-to-use meter that detects and measures concentration levels of carbon monoxide (ppm) and temperature (Fahrenheit/Celsius), making it the perfect choice for HVAC professionals. Features backlit LCD screen, warning indicator light, audible and visual alarms and multiple function buttons. Includes carrying pouch and 4 x AAA batteries.Features Easy-to-use CO meter detects and measures concentration levels of carbon monoxide gas Portable CO detector with user protection and short-term exposure limit (STEL) alarm Backlit display with CO measurements (0 to 1000 ppm) and temperature (Fahrenheit and Celsius) Auto-power off after 20 minutes of no usage helps conserve battery life Low level alarm (35 ppm) and high level alarm (200 ppm) Meter is NOT intended for use as personal protection equipment Audible Alert, Auto-Power Off, Visual Notification Audible and visual alarms Includes carrying pouch and 4xAAA batteries WarningsRead, understand and follow all instructions, cautions and warnings attached to and /or packed with all test and measurement devices before each use. Measurement Range: 0 to 1000 ppm CO Temperature Range: 32 to 122 F (0 to 50 C) Alarms: Audible and visual; STEL; Low level 35 ppm; High level 200 ppm Display: Backlit LCD Power: 4 x AAA batteries Dimensions: 7.75 in x 2.16 in x 1.45 in (19.7 cm x 5.5 cm x 3.7 cm) Weight: 0.318 lbs (6.87 oz) Material Included: Pouch Country of Origin: China DownloadsSpec SheetSafety Data SheetVideo DownloadInstructionsET110-Manual - WEB.pdf