This app is a third party controller für dbx ZonePRO 640m, 6541m, 1260m and 1261m. It can control the most user features like volume, input source, muting and mixing. An unlimited number of zonePRO devices, all in the subnet, can be connected to. Please note, that no other hardware controller or third party controller should be connected to the ZonePRO-device, when the app is in use! Furthermore, only one instance of this app should connect to the ZonePRO device!