Ambient Weather WS-1201 Observer Solar Powered Wireless Weather Station with Solar Radiation and UV The ambient weather observer weather station, combines reliability, easy installation and dual wireless technology The observer is accurate, precise, and affordably priced; It transmits 915mhz from the outdoor sensor array and indoor temperature sensor The observer transmits outdoor temperature, humidity, wind speed, wind direction, rainfall, UV and solar radiation from the all-in-one sensor array The observer also transmits indoor temperature, humidity and barometric pressure from the indoor temperature array You also get dew point, heat index, and rainfall rate, and a graph provides detailed trends for barometer, temperature and humidity