Oregon Scientific RMR803A Helios Solar Climate Monitor Displays indoor/outdoor temperature and indoor humidity Solar panel draws from ambient light to power the unit and extend battery life Features date and us time zones Displays indoor/outdoor temperature and indoor humidity Solar panel draws from ambient light to power the unit and extend battery life Features date and us time zones Ice alert function: LED light blinks when outdoor temperature nears icy conditions Wirelessly transmits outdoor sensor data from 100-feet away