Lunarlipes New Upgraded Plug-in Carbon Monoxide & Natural Gas Detector with Screen Flip, 4-in-1 Combination CO & Gas Detector with Temp/Humidity Sensor, CO, Propane, LPG, Explosive Gas Alarm (2-Pack)Brand: Lunarlipes Color: White Features: 4 IN 1 CO COMBUSTIBLE GAS DETECTOR4 in 1 CO & gas detector can monitor the current environment of carbon monoxide, combustible gas, temperature and humidity in real time. Equipped with 4 independent high reliability sensors, it can detect CO range from 0~999PPM, combustible gas range from Lv 1 4 Lv4 (15% LEL), temperature range from 14~122 10~50, humidity range from 0~95%RH. real time monitoring of gas safety