Pure Power AC MRC Pure Power AC - compatible, powerful and worry free Compatible: Pure AC sine wave output assures compatibility with most AC loco sound systems Power: 130+ watts of sustained power; never mind this short-term peak power stuff. The Pure Power AC can easily handle four locos and plenty of passenger cars with lights. Linear speed control: Rugged cabinetry with slide transformer for smooth linear control throughout the speed range Accessories: Fixed 14VAC output terminals for accessories Features: Horn/whistle and bell buttons, pilot light, master on-off switch, overload indicator, direction button