Specifications: 1) Rainfall display range: 0 to 19,999mm 2) Outdoor temperature range: -40 ~ +65°C (-40°F to +149°F) 3) Indoor temperature range: -9.9 ~ +60°C (-15.8°F to +176°F) 4) Temperature accuracy: ±1.0°C 5) Power requirements: a) Receiver: 2 x \"AA\" alkaline batteries (not included) b) Rain gauge: 2 x \"AAA\" alkaline batteries (not included) 6) Transmission range: up to 100 meters (330 feet) 7) Transmitting frequency: 433MHz Features: 1) Wireless outdoor sensor (range up to 100 meters) 2) Detailed display of rainfall data in 1 hour, 24 hours, week, month and total since last reset (user selectable in inches or mm) 3) Indoor and outdoor temperature (°F to °C) 4) Time and date with manual setting 5) 12/24 hour time mode 6) Calendar 7) Time zone setting 8) Time alarm 9) Free standing Package includes: 1 x Rain Gauge 1 x Receiver 1 x User Manual 2 pieces of screws