The new G5 series of Radions are only controllable via our new Mobius platform. Mobius is a very exciting development in the Radion line and will allow you to control via G5 directly via the built-in Bluetooth connection. All previous model Radions did require the use of a ReefLink in order to allow for wireless control but no longer. The G5 and it's BLE connection come fully controllable from the factory via Mobius. Even better news, Mobius will continue to evolve allowing for the control of more and more EcoTech devices in the near future.