Quality. Precision. Optics. 660x maximum power. 120x recommended power for most viewing conditions. Includes: 2x / 3.3x Barlow lens. Increases magnification 2 - 3.3 times. Interchangeable eyepiece. 1-1/4 inches eyepiece in 25mm, 12.5mm, 4mm sizes. 1-1/4 inches moon filter. Reduces the moon's brightness and improves contrast for greater lunar surface detail. Tasco Skywatch cd rom bring the wonders of outer space to your pc with software that stars a database of 10,000 celestial objects, lets you recreate astronomical wonders like a total eclipse, or even create you own sky charts. Specifications: 660x power, refractor telescope, 1.25 inches interchangeable eyepieces, slow motion controls, sturdy metal tripod, Skywatch CD-ROM with, 10,000 object database