2. This multifunctional Rechargeable oxygen detector also can measure temperature. 1. Adopting electrochemical sensor, which gives a quick and accurate measurement. 4. The oxygen monitor has audio and visual alarm, you can set audio alarm decibel that can give you a obvious prompt. 3. With a large LCD screen display the measured results, you can get oxygen concentration and temperature at a glance. 5. Portable and handheld, easy to operate and carry. Widely used in chemical industry, electronic industry, underground operations, in-car oxygen detection., Weight: 1.6203976257 pounds, Manufacturer: Jaywool