In addition to their internal battery packs Adaptador AC for ETX-PE, LXD, LX90, LX200 (up to 14"), LX400, MaxMount may be powered from standard 115v. AC home electricity with the AC Adapter. The adapter plugs into any standard home outlet and includes a 25 ft. cord connecting to the telescope's control panel; input voltage to the telescope is 12v.DC. (12vDC 5A).