2-LINE On/Off Switch for Any Telephone Device Connected to a 2-line RJ-11 Phone Jack. The Telephone Remote Interrupt Control Kit 2. The Trick 2". Amazon Exclusive, from Grandpa and Granny Co.! Each TRICK 2 includes One Control Module, One 7ft modular phone Cord and One double sided adhesive mounting Pad. See Product Description below for more information. The TRICK 1 for 1-Line Phones is available as well. See How-To Diagram to left: Install a 2-line TRICK 2 between the wall jack and your 2-line phone. This will allow you to switch Both phone lines on or off at the same time. Or, you can install a Separator2 to separate your lines and install a 1-line TRICK-1 between the L1 or L2 jacks, or both, and your 1-line phone, fax or device to allow you to switch either line on or off. All TRICK Modules are assembled and tested for Quality Assurance in the U.S.A. by Grandpa and Granny Co. and have a 1 year Warranty. All TRICK items are only sold by Grandpa and Granny Co. Standard shipping via USPS First Class Package and Expedited shipping via USPS Priority Mail to all 50 States. International shipping via First Class International. Grandpa and Granny Co. line of TRICK components enhance your phone experience. Order the necessary TRICKs, Splitters, Separator and Cords required for your custom application from our Amazon Storefront, be creative!