Auto stop dual action airbrush pen:Portable mini cordless airbrush compressor kit has auto stop function with patent, work with double action airbrush gun kit to reach auto stop function, firstly to press the button to turn on the machine, and then press the air brush trigger down to come out the air, “Auto stop” brings you less noise, much longer time to use etc. Auto stop rechargeable airbrush kit is strongly recommended as it is professional airbrush compressor kit. Easily battery replaceable cordless airbrush kit:We upgraded this new mini handheld airbrush with compressor with easily battery replacement way, just push the bottom of the airbrush compressor body to take the battery off to change a new one, and just plug the replaced one for continue work. Please note the correct direction when plug in. This is really an applicable airbrush starter kits for both beginners or testors Two connect way to airbrush:We added a braided hose to reach two connect way, you can connect the air brush pen to the electric air brush machine directly to work as hand-hold wireless airbrush cordless, or you can connect the airbrush gun through the airbrush hose, you can put the small electrical air brush compressor into your pocket and only hold the airbrush pen in your hand to spray. Connect with different airbrush pens to work:With our wireless spray compressor it can connect with most kinds of airbrush pens so long as the connection joint air-valve is 1/8”. Especially when you need different colors, you can use different airbrush pen to match it to work. Remember to clean every airbrush pen after finish your spraying. Multipurpose use for different airbrush fileds. Airbrush flawless spray foundation for makeup, barber dye spray gun airbrush for hair or beard enhancement, airbrush stencils for nails, art & craft etc. If the liquid too thick, dilute it a firstly. Airbrush pen is a precise tool, customers are not suggested to replace the nozzle, because it is very precise.