Enjoy the night sky with outstanding views of the moon and planets. Specifications for this excellent telescope are: 90 mm aperture Maksutov-Cassegrain Optical Design Focal length 1250 mm Focal ratio f13.8 Red dot Viewfinder 2 eyepieces, 26 mm and 9.7 mm AudioStar handbox controller, which gives you easy access to a 30,000 object database, and includes a built-in speaker that plays educational content about the celestial objects you view This highly rated telescope has never been used. It was won in an astronomy photography contest and matches the ETX 90 I currently have. The best retail price for this telescope is about $650, not including taxes and shipping.