1、Widely used in metallurgy, power plant, chemical industry, mines, tunnels, underground pipelines and other places, effective prevention of hypoxia and oxygen poisoning. 2、This oxygen monitor uses high quality gas sensor, safe and reliable, accurate measurement, stable performance. 3、Oxygen detector is suitable for the detection of oxygen concentration in ambient air. 4、Three alarm forms, sound, light and vibration alarm, can be adjusted to ensure safe use. 5、It can record data and has review function, continuously record 12,000 data. 6、There are five icon options in the main menu, real-time measurement, recording, alarm setting, system setting and calibration. 7、Adopt embedded microcontrol technology, easy to operate, complete function, high reliability. 8、The shell is made of high strength engineering plastics and compound anti-skid rubber, which is dustproof and explosion-proof and durable to use. Condition: 100% Brand New Item Type: Oxygen Detector Color Black+Red Material ABS Testing Gas Oxygen Concentration（O2） Display Unit ％VOL Measurement Range 0~30％VOL Resolution 0.1 Accuracy ≤±5％FS Data Record 12,000 Datas Response Time（90％） <30s Alarm Sound and light vibration alarm Alarm Point Adjustable Working Voltage DC3.7V，1800 mAh Battery LP103450-1800mAh Rechargeable Li Battery Operating Conditions -20~50℃/ -4~122℉，<95％ Storage -10~50℃/ 14~122℉，<85％ 1 x Oxygen Detector 1 x Plastic Tube 1 x USB Cable 1 x Gas Calibration Cover (with one screw) 1 x Storage Box 1 x Instruction 1 x Power Plug