Review on EEEKit 6-Pack Digital Hygrometer Thermometer LCD Monitor - Indoor Outdoor Humidity Meter Gauge for Humidifiers Dehumidifiers, Greenhouse, Basement, Babyroom - Black Round Design, Fahrenheit/Celsius Measurement by Richard Cummings

Update June 2019: The seller accidentally contacted me 4 months after purchase to offer a refund and I agreed. Unfortunately, my original review still stands. At least 2 out of 6 will flicker, go mad and reset if you just touch them. Some just turn off and you have to wiggle them and fiddle with batteries to keep them on. I don't even use them for what I originally bought them for. Now they're scattered randomly about my newly sealed basement to keep track of fluctuations, and they're hardly good enough for that. I'm adding an extra star because I get my money back a few months later. Sorry to the seller but this is crap. They sync very well out of the box, but relative humidity readings in a controlled environment are at least 10% lower than other meters. Even with extreme fluctuations, the sensors did not move more than +/- 5% RH. I like their size and display, I'm just not happy with inaccuracies.