... ;Available for Natural gas, LPG, Gas and CO detectorMAIN FEATUREHigh reliability sensorAuto-reset after alarmMCU processing ... fanSMT adopted, excellent stabilityAvailable for Natural gas, LPG, CO TECHNICAL SPECIFICATIONOperating voltage: 220V AC or 12V DCRated power ... Natural gas, 100 PPM of COAlarm indicator: Corresponding Red LED flash Malfunction indicator: Yellow LED on & Beeper long- ...