National Geographic Astro Planetarium MultimediaYour own planetarium at home! Projects the stars on the ceiling, accurate to time and day! You can even see falling stars, thanks to the planetarium's integrated motor. Listen to background music with the built in FM radio or by connecting to a digital music player. FEATURES Projection screen: approx. 1. 6m x 2. 2m (at 2m range) Lumen power: 190 lm (at 2 m celling height) Projection of stars or star constellations Built in radio function and speakers