The product is really really good! Very easy set-up and it's not really necessary to align the transmitter great. Recommendation: The upper broad surface of the receiver should be horizontal nor forward "show" in the direction of remote controls, the receiving angle is greater. I have a part in a two-part TV board with flaps (amplifier Yamaha) and in the other compartment (Tevion BD and a Pearl twin receiver) everything works fine. From me a clear recommendation, when the "doors / flaps" should be closed and it should work.