Ambient Weather WS-04-WHITE Wireless Thermometer with Indoor and Outdoor Temperature, White;

Specifications:
Remote temperature range: -40°F to +149°F
Indoor temperature range: 32°F to +140°F
Temperature accuracy: +/-2.0°F
Console Dimensions (LxWxH): 3.5 x 2.5 x 0.6"
Synchronized instant reception
Low power consumption (over 2 years battery life for both base station and remote sensor)
Power requirements:
Base station: 2 x "AAA" alkaline batteries (not included)
Sensor : 2 x "AAA" alkaline batteries (not included)
Transmission frequency: 433MHz
Transmission range: up to 120 feet