The Celestron AC to DC Power adapter has a standard 2-prong North American power plug on a ~6' cord on one end, and a 5.5mm circular DC output jack on a ~6 cord on the other side; in between is a transformer box. The North American plug cord is detachable from the transformer; the cord with the 5.5mm DC plug point is permanently attached to the transformer. Output of this unit is consistently 12 volts DC. This allows AC 120-240V, 50-60 Hz AC current supplies to power any of the Celestron telescopes with the 5.5mm DC input on their drive base, a long list of items which includes the Advanced, Celestar 8, CG9/11/14, CI700, CPC, CGE, NexStar i, NexStar SE, Celestron NexStar i, NexStar SE, Ultima 2000 series and others.