If you want to use it on a bright sunny day in perfect conditions in a flat RV park, then this gauge is for you. If you want to get off the beaten track, get something else. It looks tough in the picture, until you drop it on the curb (when you really need me to try and pump up a flat RV tire) and the shiny plastic parts (you thought it was metal) cracked. The sensor survived, but I couldn't connect it to the tire's air valve due to cracks. Looks solid, but it's not. It's in a dumpster now, on a roadside somewhere in Idaho.