Product details:

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 over 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 our smart phone app, quick and accurate polar alignment is just a joy.