After years of frustration with a cheap Harbor Freight air compressor, a stiff 25 foot hose, a simple tire inflator and a ballpoint pen, I finally decided to treat myself and bought some quality gear. I bought a really nice little California Air Tools compressor, a highly rated 25ft coiled hose and this JACO FlowPro and WOW tire inflation sensor. Now I'm a happy camper! read to get the exact tire pressure you want. Inflate with the big lever, deflate with the small brass button on the side. The high quality brass tip at the end of the hose has a small lever that you need to press and then insert the nozzle into the valve stem where it locks into place. I just pumped up the tires on my two cars and two motorbikes and it used to be horrible, now it's quick and easy! No wonder this JACO device gets such good reviews. That's great! BUY RECOMMENDATION!