... suction)2, LCD digital display3, sound, light, vibration alarm at the same4 DC3.6V ~ 4.5V battery supply ... voltage5, alarm point can be set (default setting: See table) ... : LCD display7, alarm error: ≤ ± 5% (F.S)8, Alarm mode: sound, light, vibration alarm9, response time: ≤ 40s10, sensor life: ≥ 2 ... ring, Chemical Services and other occasions Combustible Gas Detector