Autolock Upgraded Airbrush Kit with Air Compressor | Portable Cordless Auto Airbrush Gun KitAuto Airbrush & Battery Level Display: This dual action airbrush does not need a switch,just press the trigger to work, air will be sprayed, move the trigger back, the liquid will be sprayed, you can freely control the liquid output The amount of paint will automatically,stop working after releasing the trigger. In addition, there are 4 indicator lights at the bottom of the air compressor to display battery power. Before using the spray gun, please