The AC Power Supply with LP-E17 Type Dummy Battery comes with a standard U.S. prong that plugs directly into an AC wall outlet to provide a continuous power supply to your camera over an extended period of use. The power supply converts 100-240 VAC to approximately to 7.2 VDC, and it is compatible with cameras that take the LP-E17-type battery. With a multi-voltage power supply, it can be used worldwide with optional plug adapters. To give you enough room to move around while connected to an outlet, the AC adapter is supplied with an 8' cord.