Don’t be confused @Baltazard, Google is your friend, so if you are interested in these Roger Assistive Listening Devices (ALD’s) tis easy to educate yourself…. None of this is rocket science, although these devices are fairly sophisticated pieces of kit, their operation is very simplistic, the confusion comes with how they deliver the signal to your aids; Either By, Bluetooth, Phonak Airstream, Roger X Receiver, Compilot, Inductive Loop, Roger Touchscreen, and others besides those…… There are other uses out-with the hearing industry, Roger was originally (allegedly) developed by Sonova/Phonak for the American Military (SEAL Team 6). The film industry widely use Roger Touchscreen’s, with tiny Roger receivers at £1345 a pop!!! Each actor on the set will have one hidden in their ear, the director can speak to to each actor individually or collectively…. Cheers Kev