SHIJIN 4-in-1 Detector for & Natural Gas with Digital Display - Monitors CO, Gas, Temp, Humidity | Plug-in w/Battery Backup for Home, RV, Apartment Safety Gas Detector

High precision sensors Sensitive and stable detection performance High precision sensors accuratelyidentify and capture in the gas, with a special patent that reduces interferencewhile compensating each other to ensure the accuracy ofvarious indicator measurements high-performance chip Accurate detection and prevention in advance Equipped with a high-performance electrochemical chip, it ensures accurate data acquisition in the air,ensuring a safe and secure one-step solution. Day/Night Mode Switching and worry free sleep switching 。 Quick (H button) Switch between the first mode to turn off thescreen,the second mode to low brightness night mode, and thethird mode to high brightness day mode,ensuring a stablesleep throughout the night. Day/Night Mode Switching and worry free sleep switching 。 Quick (H button) Switch between the first mode to turn off thescreen,the second mode to low brightness night mode, and thethird mode to high brightness day mode,ensuring a stablesleep throughout the night. Easy testing Is the alarm working Under normal machine conditions, aim the ignited cigarettegas at the position ofthe sensor. When the device has a digitaldisplay or an audible and visual alarm, it indicates that the is working properly.