If you have an existing cell phone signal booster system and you're looking to expand your indoor cell coverage, then you need our Antenna Expansion Kit. An indoor antenna should be installed in an area with the weakest cell reception, like an office or other interior room. Your Antenna Expansion Kit will come complete with either Panel or Dome antenna(s), signal splitter, and the necessary cable assemblies to ensure easy installation. DAS (Distributed Antenna System) wireless networks have been specifically designed to provide both cellular and Wi-Fi coverage throughout an entire structure. Standard applications include 3G/4G/LTE Cellular networks and 802.11a/b/g/n and 802.11ac networks. Adding a 2nd, 3rd, or 4th indoor antenna to your 50 Ohm cell phone repeater system is easy with our expansion kits because they include parts such as splitter and cable that is needed to connect to any existing signal amplifier system.