Features: 1¡¢Wide Application: Widely used in factories, homes, offices and public places so on. 2¡¢Easy To Use: Large screen LCD backlit display, which can be read in the dark, save your labor. 3¡¢Portable And Lightweight: Portable monitor, used to detect O2, temperature, ¡æ/¨H unit can be switched. 4¡¢Accurate Detection: Quick response to gas detector, sound and light alarm instructions. 5¡¢Electrochemical Principle Measurement: High measurement accuracy with battery indicator, alarm value setting, adjustable volume. Item Type: Oxygen Detector Material: ABS Model: AR8100 Battery: Lithium battery 3.7V 1000mAh (built in battery) Uses: Widely used in factories, homes, offices and public places. Support Language: English Alarm: Audio and light Working Time:> 90h Working Temperature: -10-50¡æ Measuring Range: 0~30% Resolution: 0.1% Accuracy: