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![Vertex Standard VXD-720 Radio 512 Channels UHF [VXD-720-G7]](https://cdn11.bigcommerce.com/s-3f922/images/stencil/200x200/products/612/1041/VXD-720__99876.1347845068.png?c=2 "Vertex Standard VXD-720 Radio 512 Channels UHF [VXD-720-G7]")
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VXD-60UD UHF Duplexer (440-470MHz).
Installing a duplexer inside your repeater allows you to operate your repeater with 1 antenna for transmitting and receiving. Otherwise, without a duplexer, 2 antennas are needed (1 for transmitting and 1 for receiving).