You'll love using this Celestron NexStar 130SLT Computerized Telescope to admire of the beauty of the night sky. The powerful design can spot terrestrial object for close observations from right at home. The auxiliary port allows for use with accessories such as the CN-16 GPS module to better enhance the experience. The fork arm and tube on this Celestron NexStar 130SLT Computerized Telescope can be released if needed to cleaning or repair. The city database quickly and easily sets locations for quicker use.