"Introducing The Skytracker Pro - iOptron's Next Generation Camera Tracking Device! <*> Upgraded from SkyTracker, the Pro is more compact, small enough to fit on your palm, better precision, silent tracking, it even has a built-in rechargeable power source that runs for up to 24 hours of continuous operation. The improved precision polar scope maintains a fine engraved reticule, now features adjustable illumination with eight brightness levels. Using with iOptron smart phone app, quick and accurate polar alignment is just a joy. The SkyTracker Pro features four tracking rates, 1X or sidereal, 1/2X for sky and landscape, solar and lunar. All 4 tracking rates work in both northern and southern hemispheres. All metal structure with ABS covers Attaches to a camera tripod with 3/8"" or 1/4"" threads Accepts cameras weighing up to 3 kg (6.6 lbs) Silent tracking for smooth camera motion, perfect for long-term exposures Detachable alt-azi base with fine latitude and azimuth adjusters for easy polar alignment Reversible mounting post for both 3/8"" and 1/4"" threaded ball head mounting Includes iOptron AccuAlign dark-field illuminated polar scope Adjustable polar scope illumination with eight brightness levels 4 tracking speed (1X, 1/2X, solar and lunar). 1X celestial tracking for imaging the sky and stars; 1/2X tracking speed for imaging both the starry night and the landscapes at the same time Quick sle"