It's a TBC & digital FX board. As suggested, it only gets power from the ISA slot. It's controlled through the serial port. I'm not familiar with this one, but they usually have a little 3-wire jumper that connects to a header on the Amiga motherboard. The header is an interior connection to the Amiga's serial port.
Without the software about all you can do is hope that it works as a TBC in default mode..
