This is the TMCC TPC Cable Set from Lionel®. FEATURES: This cable set connects up to 2 PowerHouse Power Supplies (LNLU2983 to the TPC 300/400 (LNLU4189 or LNLU4179). (You can power the TPC with 1 PowerHouse Power Supply, or power it with 2 PowerHouse Power Supplies, or you may power the TPC with 2 transformers.) INCLUDES: (2) Single Adapters (1) Double Adapter kr11/19/03 ir/jxs