Well 24 hrs later it's reading 67 in with the 62 boveda and has been steady at that since late last night so I'm guessing that's where it's staying. A little disappointed that it's that far off but for what I paid I'll deal with it. besides I'm going to be running 65 HF beads so as long t it read's around 70 it'll tell me it's right. Besides from what I've heard with HF bead's there's little worry about hygrometer.