[. . . ] Antenna dicharge units (or Lightning Arrestors) should be located outside the building or inside the building between the point of entrance of the lead-in and the TV, and as near as practical to the entrance of the conductors to the building. NEC - National Electrical Code * Antenna Discharge Unit is not required if lead in conductors are enclosed in a continuous metallic shield that is permanently and effectively grounded. [. . . ] It is essential for proper operation of this antenna system that the power injector be connected between the antenna and any devices such as splitters, additional amplifers, matching transformers, networks, etc. Disregarding this important notice may result in damaging the power injector or improper operation / poor performance. Wall mounting the unit (indoor or outdoor) do all the antenna assembly work on the ground. Using the L brackets as a guide mark position for the two 2" wood screws. if possible locate a stud to screw into , adjusting the L brackets accordingly. If studs are not available use appropriate wall anchors (not included, available at any hardware store). Screw the wood Screws into the wall but leave about 1/2" to allow for the last step. Attach the cable to the F connector on the underside of the unit and slide the weather protection boot over the connection. Hook the top of the L brackets onto the wood screws through the keyholes. At this point tighten the wood screws fully into position and tighten the L bracket screws. Attach the cable to the F connector on the underside of the unit and slide weather protection boot over the connection. As previously noted the power injector must be placed in-line between the antenna and before any splitter or additional devices. [. . . ] This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. For Technical support send an email with the model number of the product and a detailed description of your problem to: Email: tech. [. . . ]