Power booster for supplying operating current to larger layouts (H0 or 1), which are controlled by Märklin Systems. This unit can be connected to a Märklin Systems transformer. 48 VA maximum output power, 3 amps maximum current. This unit is connected to the Central Station by means of a 9-pin data bus line. This unit registers itself and communicates automatically with the main controller. Feedback feature to the main controller from the track and from up to 8 s88 feedback module decoders (not included) connected to the layout. Two-color LED's on the Booster and the main controller"s screen display the operating status of the Booster. Several boosters may be used in one system. Plastic housing. Dimensions: 150 x 110 x 80 mm / 5-7/8" x 4-5/16" x 3-1/8".