Humidor / Hygrometer Lid with Temperature for Wide Mouth Mason Jars - Store Cigars, Spices, or Herbs

Built-in Button with Intuitive Controls – Located on the underside of the lid, the button controls the digital display:

• Long Press: Power On/Off

• Double Press: Toggle °F / °C
  Instructions are embossed directly into the lid for easy reference.

Comes with LR44 button battery - easy to replace.