[High Sensitivity and Accurate Gas Sniffer]--Detect various gases, Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S) and Gas (). Detection error is 5% F.S. Fast response time: T Less than 30s. The LCD screen displays the four concentrations of gas, O2, H2S and CO in real time. For example: 0-100%. O2: 0-30% . H2S: 0-100PPM. Carbon monoxide: 0-1000PPM. Keep you safe in the workplace at all . [Four Alarm Modes]--The gas leak detector has 4 alarm modes: sound, light, vibration and display alarm, alarm when it reaches the preset level. Accurately measure gas concentrations and real-time, easy-to-read digital feedback on the screen. The high and low alarm values can be adjusted as needed. [-to-Use and High Quality]--The gas detector can be used directly. You just need to turn it on and it will start working. Factory calibrated. Open and use directly. Made of high-strength ABS and durable engineering plastics, it is waterproof, dustproof, explosion-proof and high temperature resistant. Built-in 2000mAh rechargeable lithium battery can work continuously for a long time (about 12 hours). [Practical Gas Sensor Detection Tool]--Small size, with a unique clip on the back, easy to carry. When your hands are not free, you can hang it on your belt or pocket to keep you safe while working in confined spaces, effectively predicting to keep the environment safe. With this detector, your family, friends or colleagues can be of safety even if they live or work in polluted areas. [Wide application] The gas detector can be widely used in households, petroleum, industry, metallurgy, agriculture, oil refining, fire protection, medicine and other fields. It can effectively predict and alarm the concentration of dangerous gases and alarm to a safe environment. size: 14 x 7 x 5.5cm Material: engineering plastic colour: black Package Contents: 1 x Simple gas detector 1 x charger 1 x aluminum alloy box 1 x Standard Gas Hood Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.