Visol Modern Small Circular Digital Hygrometer Digital Hygrometer with Precise Readout; Shows Digital Temperature; Included Magnetic Plate with Adhesive; Battery Included (LR-44 1.5 V Alkaline Button Cell Battery; Approx. Dimensions: 1.75 inches (Diameter with Face) x 1.55 inches (Back Diameter) x 0.55 inches (Thickness); Approx. Weight: 0.04 pounds Made with Plastic; Battery can be Easily Changed; Can be also inserted in Travel or Desk Humidor with Circular Slot (Check Dimensions for Accuracy) Comes Packaged in Cardboard Box; Comes with Detailed Instructions Manufacturer Updated This Product to Show Temperature in Fahrenheit.