SB3a 5-Amp Smart DCC Booster

Adds expanded and updated features to Power Cab DCC system. 5 amps of power to run trains and accessories. The first and most noticeable feature is 5 amps of power to run trains and accessories. Power Cab(s) used with the SB3a can now be unplugged and used in true walkaround fashion. Up to four cabs can be used. Cabs have up to six recalls each. Converts to booster only when used with a larger system. Requires power supply such as P515 (524-215, sold separately).