House Materials: ABS Accuracy; +/-3% F.S. Alarm method: light, sound and vibration Features1. Test gas in ... , workshop, train, bus, mine, mountain, vessel cabinet ect.2. With backlight, alarm with light vibration and sound. 3. 1800mA rechargeable battery ... grade: IP65 Specifications: House Materials: ABSAccuracy: +-3% F.S.Alarm method: light, sound and vibrationWorking Temperature: -40°C ~ 70° ...