Digital Thermometer and Hygrometer Technical parameter: Big screen LCD display. Display two-place temperature. One-place humidity simultaneously. Comfort display. Three kinds of placement. Measuring range: In: -30℃-+50℃ Out: -50℃-+70℃ Humidity (20%-+99%) Power: DC1.5V one 7# alkaline battery (optional) Product size: 115*64*19mm Screen size: 60*43mm