I have based remote control of GM-sat, I suspect that the other sellers are identical. The remote control is externally a very accurate copy of the original. The buttons require a little pressure, but act with value and function. My DM800 could be controlled well. But: The function of the TV button does not match the original. It can indeed be a long press of the Shift key (in TV mode) some buttons on the remote with the TV function teach. Unfortunately, exactly the interesting block is not in the center with the up / down / left / right / OK buttons. We use exactly this function but that TV remote control is deep with us in the drawer. Therefore, I have sent my to GM sat back. With the service I was here for peace very. (The 6-pin connector in the battery compartment to flash the remote is missing the way - but that is likely to disturb hardly anyone ...)