La Crosse Technology Wireless Weather Station Wireless Weather Station Weather one 9740-IT Features: Animated Icon Reacts to Outdoor Temperature Wireless Outdoor Temperature (F or C) Monitors Indoor Temperature (F or C) MIN/MAX Records for Temperature with TIME/DATE Monitors Indoor Humity (% RH) Atomic Time & Date Set Automatically Ice Alarm Sounds when Outdoor Temperature Drops Below 39 F (ON/OFF Selectable) Specifications: Wireless Outdoor Temperature Range: -39F to 139.8F ( -39.9C to 59.9C) Indoor Temperature Range: 14.1F to 139.8F (-10C to 59.9C) Indoor Humidity Range: 1% - 99% RH Transmission Range: Up to 330 Feet Battery Life: 12 Months Receiver Power Source: 2 "AAA" Alkalines (batteries not included)