The Meade 07576 No.546 25-Foot AC Adapter for ETX-60/70/80/90, DS-2000, NGS and StarNavigator Scopes. This adapter powers telescopes on an AC power source instead of their internal battery systems. One side plugs into the wall or an extension cord, while the other acts as the tip of a 9-volt battery. The Meade 07576 No.546 25-Foot AC Adapter for ETX-60/70/80/90, DS-2000, NGS and StarNavigator Scopes comes with a 1-year limited warranty. Meade has everything you need to capture the night sky for experienced star-shooters, serious researchers and beginners alike. Serious astronomers for years have flocked to Meade telescopes for their quality optical systems and patented technology. Consumers know that "Meade Optics Inside" means that what they see through our telescopes will be views that are detailed, crisp and full of contrast. Look through a Meade this evening and see what you've been missing.