Review on ⚡🔋 Rechargeable Portable Gas Detector - 4 Gas Monitor Multi Gas Analyzer Sound Light Shock Meter Tester - 2 Year Detection by Tim Ross

This has annoying voice prompts that are not clear. The directions can also be given in another language. You will need to enter a passcode every time you try to install 4 different gases in the monitor. However, if you are in the environment where you want to measure, you must be in a clean environment for the installation. Shouldn't he already be equipped with it? If I can guess air quality, why do I even need this device? It's old technology, not user friendly and costs over $100. I received it yesterday and am sending it back today.