Project 10,000 stars on the ceiling or wall in your own home with the Edu Science Star Projector. The optical quality lens system has adjustable focus and projection angle. The 30 minute auto shut off function allows you to leave it on and it will switch itself off. Project the actual Northern Hemisphere onto your wall or ceiling! Also includes "CyberSky 5", an educational astronomy program with accurate maps of stars, constellation, sky and solar system. Product Features: Optical quality lens system Adjustable focus Adjustable projection angle 30 minute auto shut off function Optimum projection distance: 1.5 - 2.0 meter Projector Two interchangeable discs with the fixed star of northern hemisphere Space Map Instruction Manual Requires 4 x AA batteries (not included) For ages 8 years +