About the Meade #546 AC Adapter... The Meade #546 AC Adapter plugs into any standard outlet and connects to the 9V battery clip type connector on all compatible models. For older Meade ETX-60, ETX-70, ETX-80, ETX-90, StarNavigator, DS-2000 and NGC models The Meade #546 AC Adapter allows powering and operation of the telescope from a standard wall outlet. Please note that the power output is a 9V battery clip type, please check your owner'''s manual for compatibility. Meade #546 AC Adapter Features... Allows powering and operation of the telescope from a standard wall outlet Plugs into any standard outlet Connects to the 9V battery clip type connector on all compatible models Save big money on batteries! Meade #546 AC Adapter Specifications... Works on most Meade Legacy telescopes Equipment Type: AC Adapter Application: For Meade ETX-60, ETX-70, ETX-80, StarNavigator, DS-2000 and NGC models. Does not work on current production ETX 80, 90 or 125 Observer models Plug Body: 9V to standard grounded AC outlet Meade Product Number: 07576