What is the blue button on the natural gas meter and how to operate it?

Generally speaking, there is a blue button on the natural gas meter to control the flow of natural gas, which can be used to adjust the gas volume, thus adjusting the consumption of gas. The operation method is: turn the blue button to an appropriate position to adjust the flow of natural gas, which can be easily adjusted and the gas used is more reasonable. At the same time, the blue button can also adjust the sound of gas and reduce the noise between gas users.