56403 PIKO SmartDecoder 4.1 8-Pin (HO-Scale) $43.99 This product is temporarily unavailable. Default Title - $43.99 Quantity Please fill in the form below if you'd like to be notified when it becomes available. 56403 PIKO SmartDecoder 4.1, 8-Pin, Replaces 56121 (HO-Scale) Features Provides for Digital/DCC control of locomotives