Specification: This hygrometer has a probe, which can test some places humidity exactly.   Type: Digital Thermometer Hygrometer Temperature Range: -50°c - 70°c Measuring Humidity Range: 10 percent RH - 99 percent RH Humidity Accuracy: 5 percent Humidity Display Resolution: 1 percent RH Temperature Accuracy: 1°C Operating Voltage: 1.5v, 2 x LR44 Batteries(Include) Sampling Period: 10S Features: LCD Display, Thermometer, Hygrometer, with A Probe Dimension: 48mm x 28.5mm x 15.2mm or 1.89" x 1.12" x 0.60" (Approx.) LCD Dimension: 40mm x 22.5mm or 1.57" x 0.89" (Approx.) Installation Dimensions: 46mm x 27mm x 13.5mm or 1.81" x 1.06" x 0.53" (Approx.) Cable Length: 1.5m or 59.06" (Approx.)   Notes: Due to the light and screen setting difference, the itemand 39 s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.   Package Includes: 1 x Digital Thermometer Hygrometer Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store