Helios - Powered by the sun. At Oregon Scientific we are committed to exploring alternative and renewable energy to power our consumer electronics. The Helios family of products continues our pursuit to integrate the weather monitoring features you want while helping you save electricity - and money. The built-in solar panel extends the battery life in the weather station by using energy from the solar cells. The Helios Solar Weather Station allows you to monitor the current temperature and humidity in up to 3 locations around your home, all while helping to save the environment outside. Features: Displays indoor/outdoor temperature and humidity (up to 3 channel). Forecasts the weather for the next 12+ hours. Solar panel draws from ambient light to power the unit and extend battery life. Daily high/low memory for outdoor/indoor temperature and humidity. Ice Alert function: LED light blinks when outdoor temperature nears icy conditions. Atomic Clock function automatically sets and adjusts for Daylight Savings Time. Backlight for easy viewing in low light conditions. Features date and US time zones. Wirelessly transmits data from 100-feet away. Requires 3 AA batteries, not included. Includes THGN132 wireless sensor.