Thanks Charlie, hadn't seen that yet. AFAIK that's most likely for the mid 70's and up GR-2000 family sets. I have a 2050 set with remote........but of course you'd have to have the internal receiver for the set for this to work.

IIRC these are entirely electronic but don't remember if they're RF or IR in nature. It is NOT an Ultrasonic clicker (tuning fork "click/clunk")

Pretty rare no matter how you slice it!

Anthony