This Color Forecast Station by LaCrosse is unusual in that it displays color weather icons that are easy to read from across the room. Designed and engineered with state-of-the-art technology and components, this instrument will provide accurate and reliable measurement of the barometric pressure, weather forecast, indoor and outdoor humidity, temperature, heat index, dew point as well as an atomic clock. La Crosse model WS-450W. Unit is 6.5" x 3.5" x 1". Requires 5 AAA batteries, not included