The Meade #547 AC Adapter converts 110-volt AC to 12-volt DC power to allow you to power LXD55, LXD75 and LX200GPS telescopes from an AC outlet. The #547 has a 2.5 amp AC/DC transformer with a 6.0' cord upon one side of the transformer that plugs into typical AC outlets and a 25.0' cord upon the other end which connects to the DC power input of your telescope.
A separate ferrite inductor coil must be affixed to the telescope end of the longer cord. This device prohibits the longer cord from interfering with the telescope's computer systems, for without such a device the long cord could act just like an antenna.
Please note that this is for AC power exclusively, and if you're seeking to power your telescope with your vehicle's cigarette lighter plug than you would instead need Meade's #607 cord(B&H item code "MEPCDCETX").