Features:
1) Wireless indoor humidity (%RH)
2) Wireless outdoor and indoor temperature (°F or °C) 
3) Records min. and max. humidity
4) Records min. and max. temperature
5) Barometric pressure 24-hour history graph (inHg or hPa)
6) Barometric pressure tendency arrow
7) Forecast icons based on changing barometric pressure 
8) Receive and displays the radio controlled time and date (WWVB, 
    DCF version available)
9) Automatically updates for daylight saving time (on / off option) 
10) 12 or 24-hour time display 
11) Perpetual calendar 
12) Time alarm with snooze
13) Can receive up to 3 sensors 
14) High light LED backlight 
15) Wall hanging or free standing 
16) Included transmitter WH3
17) Synchronized instant reception
18) Cartoon display
19) Low power consumption (over 2 years of battery life for remote sensor)

Specifications:
1) Indoor humidity range: 1% to 99% 
2) Wireless outdoor temperature range: -35°C to 65°C 
3) Indoor temperature range: 0°C to 50°C
4) Temperature accuracy 1.0°C
5) Transmission range: up to 100m (300 feet)
6) Transmission frequency: 433MHz

Power requirements:
1) Receiver: 2 x AA alkaline batteries (not included)
2) Wireless sensor: 2 x AAA alkaline batteries (not included)