Your own personal meterologist right at home featuring all weather forecast, with wind & rain readings, indoor & outdoor temperature & humidity. Records historical weather data that you can download onto your PC, or use the optional La Crosse Alerts monitoring system to send alerts to your computer or smartphone. Includes USB transceiver and Heavyweather PC software for creating graphs, setting weather alarms and more. Solar-powered wireless wind sensor requires NO batteries using high-efficient solar panels to recharge.