Digital Flat Hygro/Thermometer Black
This space-saving digital hygrometer will help keep your humidor at the 'ideal' 70/70. The digital readout is more accurate than analog devices and gives you both humidity & temp in min. & max. readouts. A 'must have' for anyone who wants to keep their cigars in top shape. Battery included.
Now I understand why these things sell for so little money, they're either junk or not robust. Ordered one, pulled the battery tag, placed it in my humi and everything seemed to be fine, for like four days. Then the display went dead. I even spent a few bucks on a new battery which was stupid 'cause it still wouldn't work. Unless you purchase 100 of these for $0.10 each, you're better off paying more for one that will last longer than it takes for your humidifier to re-adjust the RH after you open the lid and drop this inside.