Your Looking at a Walthers Layout Control System -- Distribution Block - Walthers Layout Control System. Walthers Layout Control System brings you a low-cost solution for easy turnout control for HO, N, Z, S, and O Scale layouts! The system is expandable at any time to grow with your layout, and can be used with DCC- or DC-power (a DCC accessory decoder is integrated into the switch machine). The system uses plug-and-play servo-style wiring with connectors, so no soldering is needed; two styles of cables are available separately to expand your wiring as needed. User-friendly instructions are included with all items, and drilling templates for easy mounting on your layout or fascia are included as appropriate. Using combinations of the system components, which include a servo-based slow-motion Switch Machine, Power Distribution Block, LED panel indicator/control pushbutton switches, add-on system cabling, a 2-amp 12V Filtered DC Power Supply and a three-piece drill set, you can easily build a complete control system. The Walthers Layout Control System Distribution Block features: *Simplifies electrical connections from power supply to as many as 8 switch machines *Built-in barrel connector for quick connection to 2 Amp 12V Filtered DC Power Supply (#949-110, sold separately) *Screw terminals to connect second Distribution Block (sold separately) or DCC power input *8 matching position inputs/outputs for easy configuration with CMRI, stationary DCC decoders, microcontrollers, Arduino, Raspberry Pi and others (each sold separately) *Includes two power extension cables and four benchwork mounting screws. Shipping is via USPS Mail. I will make every effot to keep shipping as low as possible for all purchasers. (IF YOU PURCHASE MULTIPLE ITEMS PLEASE IGNORE THE AUTOMATIC INVOICE AND EMAIL ME YOUR ADDRESS - I WILL SEND YOU A TOTAL WITH COMBINED SHIPPING).