I ordered two, one analogue and one digital. Get a 10% discount and they arrived a day ahead of Prime 2 Days scheduled delivery. Very glad I spent the extra money and ordered a more expensive Jaco instead of saving pennies and replacing my existing one with the same Chinese crap. The brass tire inflator chuck securely snaps to the tire without deflating the tire when installed or deflated, and the paddle valve and bleed valve are securely sealed. Units. The vane operated dump valve is fast acting with a reliable seal. The digital gauge glows in the dark, while the analog gauge features a luminous dial and pointer that's great for filling in in low light. No more holding a flashlight to read the scale at night. The digital meter reads from 0 to 220, which is good as it has the same accuracy and is easy to read across the range. But more importantly, analog reads from 0 to 100 full scale from 270 degrees. Range while the cheap ones have shrunk the scale from 0-220+ lb to the same 270 degrees. When was the last time you loaded a 220 pound tire? The 0-100 scale expands, doubling the distance in the normal tire pressure range, giving you a more accurate reading on the scale of where the arrow is actually pointing.