Informational: Weather stations wireless indoor outdoor records all time/24 hours max and min temperature and humidity readings; wireless thermometer indoor outdoor with temperature trend arrows indicate whether its getting warmer or colder near the remote temperature monitor Wide temp and humid range: Inside outside thermometer hydrometer measures indoor outdoor temperature and humidity percentages simultaneously; Indoor/outdoor temperature range: -4f to 158f (-20c to 70c); humidity range: 10% to 99%(Please refer to the manual for details) Hands free monitoring: Wireless thermometer outdoor with strong signal penetration humidity sensors to get the temperature and humidity records from 200ft/60m remote range away; tabletop or wall-mountable design; powered by aaa battery (Not included)It can be used by plugging in USB Widely application: Indoor/outdoor hygrometer wireless ensures proper temperature and humidity control, which has important skin, allergen and other health benefits, termometro digital can be placed in baby room, nursery, cellar, basement, warehouse and greenhouse Products include: 1 x indoor high precision digital thermometer and hygrometer 1.Please allow 1-2cm error due to manual measurement. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.