AIR COMPRESSOR-HIMK MK321

got a portable cordless tire inflator (also known as an air compressor). These are lifesavers for keeping your car tires, bike tires, or sports equipment at the right pressure without hunting down a gas station.
​Based on the image, here is a quick breakdown of how to use it and what all those parts do:
​1. The Interface & Controls
​LCD Display: Shows your current tire pressure and your "target" pressure.
​"R" Button: This usually cycles through units of measurement (PSI, BAR, KPA, or kg/cm^2).
​"+" and "-" Buttons: Use these to set your desired pressure. Most of these devices have an auto-shutoff feature—they'll stop pumping once they hit the number you set.
​Yellow Trigger: The "Go" button to start the inflation process