... ) Auto reset 4) Build-in siren, sensitivity adjustable wired/wireless gas detector/detector 1. With the most advanced MCU and central ... . Also it has 7 termials at the back of the gas alarm, which enable it can work with auto shut off ... . Auto reset5. Low false and missing alarm, highly relibale QG001A: Local alarmQG001B: local alarm, Exaust fan (110/220v output), wireless outputQG001C ...