Is the GUI available from any connected device browser such as IOS device, phone or iPad, or Android phone or tablet? If so, can the matrix switcher be controlled from these handheld devices? Is a second remote control available for purchase as well?

There's an app you can download for both iOS and Android. However, you will also need to add a wireless router into your setup in order to use the app. The kit and individual TX and RX SKUs use the same remote, so you'll have plenty of remotes to use.
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