Digital Indoor/Outdoor Thermometer Hygrometer

Large LCD display: digital room thermometer with 4.6 inch LCD screen makes it easier to read even over long distances. Just a glance at the thermometer is enough to get the readings such as temperature and humidity from 4 different places. Wide temperature range: the thermal hygrometer provides precise measurement and a wide measuring range. (Indoor temperature (-20 - 70C), outdoor temperature (-50 - 70C), humidity (10% - 99%). Also shows the trend with the arrow symbol of each measurement, which allows you to get to know the environment better. Max/min & C/F switch: the hygrometer outside can record the temperature and humidity in a timely manner. It provides the temperatures and humidity max/min records of the last 24 hours. The C / F button to switch between celsius and Fahrenheit. USB and battery operated: the main unit supports 3 x AA battery operated or iPhone USB cable power supply. When using a battery powered there is only one backlight level, and when using a USB cable, there are two backlight levels that can be selected between semi-bright or full bright. The transmitter is powered by 2 x AAA batteries.