Feature:1. Built-in industrial-grade sensor, high accuracy, real data, strong stability, real-time detection.2. Hydrogen sulfide gas detector, it can view historical alarm data and has a data storage function.3. With sound and light alarm, high safety, high sensitivity, can prevent hydrogen sulfide leakage.4. Using highstrength ABS material, waterproof, dustproof, explosionproof, safe and durable.5. Simple operation, small size and portable, mainly used for hydrogen sulfide gas detection.Specification:Item Type: Hydrogen Sulfide MonitorMaterial: ABS, MetalPurpose: Hydrogen Sulfide Gas DetectionMeasuring Range of Hydrogen Sulfide:0-100PPM;0-0.01VOL%;0-152Mg/m;0-0.23LEL%.Maximum Overload: 500PPMResponse Time: Less than 30sSensor Type: Electromagnetic H2S SensorUse Environment Humidity: 15-90%RHPower Supply: 3 x 1.5V AAA Battery (Battery Not Included)How to Use:Open the back cover and insert the battery (not included), press and hold the power button to turn it on, the electronic display will show the content of hydrogen sulfide, press "hold" to keep the data, press and hold the power button to complete the shutdown..Package List:1 x Hydrogen Sulfide Monitor (Battery Not Included)1 x Manual1 x Tool Box