1. Wrong sensor sent by seller. with an order in a short time (I pay more for fast delivery). Had to send this back and request a new one again. just the same. right.2. It looks like it was made by the lowest bidder on Alibaba. With all the rave reviews, this thing made me wonder what the reviewers were expecting. My guess is that the "fake" of these are actually made on the same production line. This is not an explanation: This is MY OPINION. If this offends you, then ignore my opinion and move on. I think it's overpriced cheap junk. However: Works well so far (one month). I don't trust the sensor and would like it calibrated before I trust it with my life. I recommend you do the same (with ANY gauge). A poor reading can cause serious problems when transporting a maximum payload or a motorhome near its maximum gross load. I would pay more for a certified (independent third party) version of this thing. Overall I give it a 3 for the cheap production of this 1970's style thing (it's not a precision instrument) and the stuffing. with an order.