The USW-Flex-2.5G-5 (Flex Mini 2.5) is the latest version of the tiny PoE or USB-C powered desktop switch from Ubiquiti. As well as being a 2.5G switch this also support RSTP unlike the 1G version. This mount allows you to install one in a standard 10" rack, it includes a keystone hole where you can either add a Cat6 or USB-C keystone as required.
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