Features:
1) Indoor temperature (°F or °C) 
2) Wireless outdoor temperature (°F or °C)
3) One sensor WH2 included
4) Can receive as many as three remote sensors
5) Free standing
6) Min. and max. memory
7) Manual set time 
8) 12 or 24 hour time mode 
9) Synchronized instant reception
10) Low power consumption (over 2years battery life for both base 
    station and remote sensor)

Specifications:
1) Indoor temperature range: 0 ~ +60°C(32°F to +140°F)
2) Remote temperature range: -40 ~ +65°C(-40°F to +149°F)
3) Temperature accuracy: +/-1.0°C
4) Power requirements (receiver): 2 x "AA" alkaline batteries (not included)
5) Power requirement (remote): 2 x "AAA" alkaline batteries (not included)
6) Transmission frequency: 433MHz 
7) Transmission range: up to 100meter (300 feet) open air