Features: OOTDTY Large LCD-with Backlights: Large LCD-display with backlights, clear to read, even under the dim light. Practical Functions: It supports single point measurement, multi-point average measurement, maximum-and minimum measurement, data hold and low indicator. Auto temperature compensation for environment varying. Ambient-Humidity and Temperature: In addition to measuring the moisture content of the material, the ambient-humidity and temperature can also be measured so that the dry-environment can be evaluated directly-on site. Auto Shut Down: Without any operation, the meter will automatically shut down after about 10 minutes to save battery-energy. ( It can be cancelled-when the user starts-up. ) Specifications: Material:Plastic Size:As Picture Shown Package Includes: 1x Humidity Tester