This professional weather stations features a jumbo bright clear display and an easy-to-install 5-in-1 integrated sesnor array (temperature, humdiity, rainfall, wind speed, wind direction), with memory of over 5000 groups of data and PC inteface. Suitable both for home and commercial applications. Features: 1. Indoor temperature and humidity 2. Wireless outdoor temperature and humidity 3. Barometric pressure 4. Dew point 5. Wind chill 6. Wind speed 7. Wind direction 8. Weather forecast 9. Moon phase 10. Solar Powered outdoor transmitter 11. Rainfall data (inch or mm): 1 hour, 24 hours, week, month, and total 12. Time, time/week and calendar Display. 13. Time alarm 14. Graph for hsitory record 15. Memory for over 5000 groups of data 16. PC interface to export data to computer 18. Color changing backlight based on diffrent temperature and humidity ranges 19. Low power indicator 20. Wall hanging or free standing Power consumption: 1) Receiver: 3 x AAA alkaline batteries or 5V/500mA power adaptor 2) Transmitter: 3 x AA alkaline batteries 3) Power Adaptor: 5V/1A or 5.9V/0.5A Battery life: Minimum 12 months for transmitter Specifications: Outdoor temperature range : -40℃ to + 60℃ Indoor temperature range : 0℃ to + 60℃ Temperature accuracy : ±1&ordm; Humidity range : 10% to 99% (1% resolution) Humidity accuracy : ±5% Barometric pressure range : 300 to 1100hpa Barometric Accuracy : ±3hpa Rain volume : 0 - 9999mm 1) Resolution : 0.3mm (if rain volume < 1000mm) 2) 1mm (if rain volume > 1000mm) Rain accuracy : < 15 mm: +/- 1 mm, 15 mm to 9999 mm: +/- 7% Wind speed accuracy : 2 m/s ~ 10 m/s (+/- 3 m/s), 10 m/s ~ 56 m/s (+/- 10%) Wind direction accuracy : 8 points Wind speed range : 0~50m/s Transmission interval : 16s Transmission frequency : 433MHZ Transmission range : 100m in open area Maximum transmission power : 0.5mW