I currently have a Dish Hopper 3 and a Joey 3.0 setup.  I would like to upgrade the Joey 3 to a 4K Joey.  The dish website says it supports Bluetooth support for wirelessly connecting your DVR to all your home entertainment devices and further states that a Bluetooth Adapter is required.  Do I need to have a Bluetooth adapter in both the 4K Joey and the Dish Hopper 3 or only in the 4K Joey?