The VP-4x4K Control App allows users to conveniently control Kramers VP-4x4K Matrix Switcher. The VP-4x4K Control App provides an easy-to-use interface to the most commonly used features of the VP-4x4K. Simply enter the IP address of your VP-4x4K and press the connect button and you will be able to switch inputs, adjust output volume, and access previously stored presets; all over your wireless network.