Whussat?

Rod, I don't think I could help regardless, but it doesn't look like you actually attached your photo .

I suspect it the "speaker" aka piezoelectric disk.  The disk generates the "beep" when a button is pushed. 

A piezoelectric speaker

Related picture in a CAB1 remote from this topic https://ogrforum.com/...25#78016146396833125

Yah that's it Vernon! My first thought  was a speaker of some kind, but I honestly don't think I have ever heard a peep out of any Cab1 I've used in over 14 years of running command. Is there something you have to do to toggle it on?

Here is the pic I tried to attach to the OP, but it went sideways somehow I guess. Maybe too much wine last night, can't be sure.

Rod

@Rod Stewart posted:

I honestly don't think I have ever heard a peep out of any Cab1 I've used in over 14 years of running command. Is there something you have to do to toggle it on? Rod

It only makes a very light beep or tone when buttons are pressed and might be out of your range of hearing. Again, it's not loud and it's just a beep to indicate a button was pressed. Even I sometimes in a loud situation say at train club, have to hold it near my head or ear to hear it, but it how you know if the battery contacts are making connection and the remote is at least responding to button presses.

Again, in testing a CAB1, I normally check for the "beep" to indicate the remote is at least semi working with good batteries and contacts, then looking at the base for the corresponding LED flash indicating the commanded button press was received by the base.

@Vernon Barry posted:

It only makes a very light beep or tone when buttons are pressed and might be out of your range of hearing.

It probably is. My wife says I am pretty deaf, and she would know!