The Portable gas analyzer MRU Delta 65 is a high-quality gas detector designed and manufactured in Germany by the reputable brand MRU. This gas analyzer is specifically designed to accurately measure and analyze gas concentrations, making it an essential tool for various industrial and business applications. The set includes everything needed for reliable gas detection and monitoring, making it a convenient and practical solution for ensuring air quality and safety in different environments.

When turned on, it says the O2 sensor is faulty. I also noticed several cracks in the glass tube where the filters are installed (shown in the photo). I can also add that it takes a long time to charge, so you may need to replace the battery in the future. The temperature sensor shows the temperature, as you can see in the video. The printer turns on, and when you press the paper eject button, it ejects. I haven't tried connecting them, but I think they work. There's also some kind of sensor included, possibly O2, but I'm not sure. There's also a set of filters. I also recommend cleaning the battery contacts in the printer to remove any oxidation (shown in the photo). I can't say anything else as I'm not a specialist and am sharing my experience with testing. I'm selling it as if it's in non-working order, but it's quite possible that after replacing the O2 sensor, it will work perfectly.