With this wireless device you can always be aware of what the outside temperature and humidity is, without having to actually go outside to find out! Also functions as a handy digital clock. Attach the wireless sensor, or just leave it somewhere outside and the sensor will measure the current conditions and wirelessly transmits the data to the monitor.Features 12 or 24-hour time display Automatically updates for daylight saving time (on / off option) Can receive one sensor Forecast icons based on changing barometric pressure High light LED backlight Included transmitter WH2 Low power consumption (over 2 year battery