The remote control is for the AS-2620, but the name on the remote is Proton AVS-2680R, which indicates that it belongs to a receiver with that name. One other thing that suggests the same is the tuner part which I do not have on this preamp. A/D is the Analog/Digital button and PL-m is the Pro Logic Mode button, all other buttons should be self-explanatory. This NCF contains all buttons from the remote (volume and mute are hard buttons).