WINTACT WT8822 Hydrogen Sulfide Detector Independent H2S Gas Sensor Warning-up High Sensitive Poisoning Alarm Detector

feature
1.HOLD data retention
2.MAX maximum / MIN minimum
3.UN VOL, UNIT switch unit in PPM, (MG / M ^ 3)
4. Alarm settings
5. Calibration
6. On/Off (timed shutdown)
Package Included
1 x hydrogen sulfide detector (without battery)
1 x manual