Automatically controls reverse loop circuits. Eliminates conventional block and switch systems. Simple hookup with two input and two output wires; five amp rating. Works with all DCC layouts. 5 amp capacity. Fully automatic. We generally ship within one day after receipt of payment and have no control over delays caused by US or International postal systems. Occasionally we delay shipment due to inventory issues, but you are notified if such an occasion arises. Thank you for visiting Midwest Rail Junction. Check out our other items! We're constantly adding more items from top manufacturers. We reserve the right to pre-sell this item from our shop. Payment options for this item are: PayPal, VISA/MC, AMEX, Discover. Seller will NOT minimize any Customs Declaration values. Please don't ask. I.