I've had enough of handheld gauges that keep getting stuck and not reading properly so I decided on this kit to use with my compressor. I don't know why, but my tires always go flat. I know it's me who rides nails and stuff like that, but the nails should just have magnets for my tires because that happens a lot. This prompted me to buy a compressor, but the gauge also has instructions. This digital reading is incredibly easier, faster and much more effective. Misreading can result in an explosion and possibly an accident, so it's worth it!