1、Detection Function: This gas tank adapter has a leakage detection function. If a leakage is detected, the instrument will restrict the flowing to defend you. 2、Three Levels: Monitor the fuel level without removing the tank. Color coded dial to let you know at a glance when the gas level is low. Here are three levels, natural gas, low gas and refill. 3、Adaptation: Our gas tank adapter can perfectly adapt to most of the instruments, you don't need to worry about any non adaptation, just use it with confidence. 4、Compact Size: The compact size of this gas tank adapter means that it is easy to carry around and can be easily stored when not needed without taking up too much space. 5、Applicable Scenarios: This gas tank adapter is compatible with all devices for POL type connections for 20lb to 40lb gas tanks.