Viking Electronics Viking LDB-1 Loop Detect Board with On-Board 12V Regulator, Phone Line Powered Provide relay closure on off-hook Trigger a security Camera Trigger tape recorder no instructions included part only Note: Not familiar with some of the electronics listed, I will best describe the item, condition, and will state whether it has been tested, no returns please, buy as is Part of an estate sale of an electronics store, lots to come Shipping: If you are buying more than one item, please remember to check off the area that requests the seller to send an invoice, so I can combine the order for you before you pay. I offer several methods of shipping, choose which is best for you. Thank you again for browsing in my store, there is always something new and exciting coming your way! Feel free to ask questions, and let me know if there is a problem with an order before putting in a claim with, so we can work things out. Thank you again Estate Treasures by Alana