Package contents: 1 rain gauge, 1 receiver, 1 user manual, 2 screws. Rainfall display range: 0–19,999 mm. Outdoor temperature range: -40°C to +65°C (-40°F to +149°F). Indoor temperature range: -9.9°C to +60°C (15.8°F to +176°F). Temperature accuracy: ±1.0°C. Power requirements: Receiver: 2 AA alkaline batteries (not included); Rain gauge: 2 AAA alkaline batteries (not included). Transmission range: up to 100 meters (330 feet). Transmission frequency: 433 MHz. Time and date with manual setting option. 12/24-hour format for indoor and outdoor temperature. Detailed display of rainfall data for 1 hour, 24 hours, week, month, and total since last reset (choice of inches or millimeters). Precipitation range: 0 to 19,999 mm. Wireless transmission of outdoor temperature and rainfall data. Includes thermometer for measuring indoor and outdoor temperature.