The RENFE Class 120 (nickname Sepia) are high-speed electric multiple units used on Alvia services in Spain.The trainsets are dual-voltage, dual-gauge units capable of changing gauge without stopping at 30 km/h 12 units were ordered in 2001, and a further 45 units in 200429 units of the class RENFE Class 121 were ordered for medium-distance high-speed Avant services.