Bests & Worsts Reviews from Amazon

If you look at the AstroAI website, as well as read everything on the box and instructions as well as the Amazon page, nowhere at all is any specification as to the percentage accuracy and +- accuracy tolerance whatsoever. The fact that this is a digital gauge does not make it accurate at all. What makes something accurate is that it is calibrated against a known standard and has quality control measures to ensure that the accuracy is repeatable. Unfortunately I have no know standard to test this gauge, but the fact that there is no published accuracy is extremely telling in iteself.