Bachmann 36-557 E-Z Command 1 Amp 4 Function 21 Pin DCC Decoder (DC Compatible)

E-Z Command 4 Function 1 Amp Decoder with Back EMF DC Compatible.

It has BEMF motor control, short and long addressing, a user configurable speed curve with 14 or 28 or 128 speed steps, 350mA function output, a quiet drive high frequency PVM, back EMF and a 1 Amp maximum power output.
It also has 4 function outputs with configurable function settings.
It measures 25mm (length) x 15.5mm (width) x 4.5mm (height).