Features: Detect 4 kinds of gas: carbon monoxide(CO), hydrogen sulfide(H₂S), oxygen(O₂), and combustible gas(EX). Intelligent voice, sound, light, vibration alarm will work when one of these gas concentration reaches the level of the alarm. It adopts high-quality gas sensors, with super high sensitivity, excellent repeatability, accurate measurement, and quicker response time. The gas detector can provide enhanced protection to you. High-strength engineering plastics, good seismic resistance, high strength, high-grade atmospheric appearance, and dust-proof, waterproof, and explosion-proof function. Large LCD display for easy reading supports Chinese-English interface and Chinese-English voice prompt. It has a compact size and unique clip design which makes it be convenient for users to carry around. It can be widely used in shipping, mining, oil exploitation, chemical, gas pipeline, tunnel construction, coal, metallurgy, paper, fire, municipal, textile, and other industries. Specifications: Item name: Gas Detector Material: ABS Color(optional): Orange/Black 4 gas: CO, H₂S, O₂ and EX gas Battery: Built-in 3.7V 600mAh battery Charging time: 1-2 hours Working time: 6-7 hours Alarm mode: sound, light alarm, and vibration alarm Product size: 140*73*32mm Product weight: 300g Note: *There could be some deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Package information: Package weight: 730g Package size: 21*16.5*8.2cm Aluminum box packing Package list: 1*Gas Detector 1*Adapter 1*Manual