dual-voltage

Etymology
From.

Adjective

 * 1)  Able to run using two different voltages, depending on the voltage supplied to the particular railway line, whether by third rail direct current or overhead wires.
 * 2)  Provided with two separate traction power supplies at different voltages, typically as a changeover point between voltages.
 * 1)  Provided with two separate traction power supplies at different voltages, typically as a changeover point between voltages.