Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si [High Sensitive & Accurate Gas Sniffer]--Detect a of gases, Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S) and gas (EX). Detection error 5% F.S. and quick response time: T Less than 30s. LCD screen displays four concentrations of EX gas, O2, H2S and CO in real time. EX: 0-100%. O2: 0-30%VOL. H2S: 0-100PPM. CO: 0-1000PPM. Keep you safe the entire time in your working place. [Four Alarm Methods]--The gas leak detector has 4 alarm modes: audio, light, vibration, and display alarm, alarms alert when preset levels are reached. Accurately measure gas concentration, and real-time feedback the easy-to-read number on the screen. The high and low alarm values can be adjusted according to your needs. [Ready to Use & High Quality]-- Can use gas detector directly. What you only need to do is turning it on, and it will start to work. Comes FACTORY CALIBRATED. Open and use directly. Made of high strength, durable engineering Material, Waterproof, dust-proof and explosion-proof, high temperatura resistance. Built 1800mAh rechargeable lithium battery can for long continuous working(About 12 hours). [Practical Gas Sensor Detection Tool]--Compact size, easy to carry with a unique clip on the back side. When your hands are not free, you can hang it on your belt or pocket to keep you safe while working in confined space, effectively predicting as to the safety of the environment. With this detector, your family, friends or workmates are safety, if living or working in a polluted area. [Wide Application]Gas detector can be widely used , petroleum, chemical industry, metallurgy, agriculture, oil refining, fire protection, medicine and other fields, effectively predicting and alarming the concentration of dangerous gases and alarm so as to the safety of the environment. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, the , the Philippines, Taiwan and so on. voltage: AC110V Material: plastic colour: black Package Contents: 1 x Portable 4 Gas Detector 1 x Charging Cable 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.