Controlled multi-protocol booster for use with MM, DCC, or mfx control panels. Suitable for systems with feedback via RailCom and symmetrical track voltage. Features adjustable short-circuit sensitivity and track voltage (10 - 20 V, in 1 V steps). The RailCom cutout of the booster can be switched on or off. Includes an internal short-circuit cut-off that can also be disabled. Maximum track voltage is 18 V at 5 A (regulated), with adjustment to 12 - 24 V (regulated) possible. Supply voltage ranges from 12 to 18 V, depending on the set track voltage.