I needed a replacement for the FB an old AIWA CD / Radio / MD / cassette compact system (The AIWA device itself seems to be the way indestructible). Is with us in the bedroom, because you want to push the little buttons now not really ever get up. Original FB there of course long gone nachzukaufen (and would even Sw ... expensive!) Since the AIWA does not need so many different commands to use (the keys start / stop / pause / forward / backward are for CD / MD / cassette equal), a Universal-FB would have been offered with 1000 buttons felt like TV adapters completely oversized. However, a mandatory requirement for the use of Seki Grande-FB is that the old FB still works reasonably. In my experience, the failure of the old FB announces but on practically forever, because most "Want to" individual buttons no longer really. So time to change! The program of Seki is really simple, and works exactly as described in the brief, clear instructions. It can be really assign each key with any of the features. So you can make good use for old, exotic devices the Seki. I have for example the keys 7, 8, 9, 0 filled with pre-break-back-start / stop. It can also be individual keys still later reprogram, you do not have to start from scratch again. The only flaw in my eyes is the spongy pressure point of the keys, the function will not be affected. That's why only 4 stars (4.5 stars not there unfortunately :-) At the lighting of the keys, you can dispense with the small number in my opinion, will only cost batteries. And the keys are very well felt, after a short press you "blind". The function as a "senior FB" I can not judge in this context. The control of two devices I have not tried, but should be no problem thanks to thicker heads "A" + "B". One could of course also place less frequently used functions to the second level. So the imagination are at the Seki no limits! For the price rundrum succeeded.