Anyone have any experience/knowledge of this ecaller?

Looks a lot like a JS 412 cassette caller. A lot of Cabella's stuff is just rebranded. I killed plenty of coyotes and fox with one. Big, bulky and heavy, I found that a Walkman cassette player and a battery powered speaker from a sound system worked as well and sold my JS to crow caller. I later went to a Walkman CD player and then added a video recorder remote sound system to make it wireless.

We did a lot of experimenting back then with different sound systems, finally the commercial system prices came down and became more reliable, Minaska, FoxPro, led the field with compact remote callers. Now there is a plethora of callers out there, even your phone and Bluetooth speakers will make a decent caller.

Thanks erich,
A friend of mine passed away and his family dug it out of his closet and they are putting all his stuff up at the estate sale. Sounds like this might be a 10-20 dollar take it sale.

I suspect the battery is permanently dead, and replacement would cost more than the caller is worth. I had one of those callers, made by Johnny stewart. Worked great 30 years ago.