Gauge your comfort and check digital humidity levels of your indoor air. Displays humidity between 1% to 95% RH. Shows minimum/maximum humidity to help monitor air changes. Learn indoor temperature so you know when to turn on/of heat. Displays temperature between 32F to 122F (0C to 50C). Quickly switch between Fahrenheit or Celsius. Large easy-to-read numbers. Humidity comfort indicator icon. Freestanding design sits on tabletop shelf or counter. Dimensions: 3" x 1.5" x 4.2". Requires 2 AAA batteries (NOT included).