This is the Pure Power Dual AC Train Controller from MRC.
Each side of this AC transformer offers 7 amps of power and 0~21 VAC of smooth, realistic variable control. Just like the Pure Power single but with twice the output, the Pure Power Dual Control runs all AC powered trains and their sound systems. The big, comfortable throttle control makes you feel like youre behind a real locomotive. Each throttle has its own separate amp meter and voltmeter so you can monitor your layout conditions. The Pure Power Dual features 14-volt AC terminals for accessories, and a power indicator light. Bell and whistle/horn sounds are available for each control. The Pure Power Dual provides over 270 watts to the track. And with its rugged retro looks, it makes for an attractive addition to your layout.
One Pure Power Dual AC Train Controller.