1. 115 VAC in 25 VAC out
2. 25 VAC in 115 VAC out
Connect coils in series
3. 2 x 115VAC = 230 VAC in, 25 VAC out (single coil) or 50 VAC out (coils in series)
4. Reverse of no 4 above, i.e. 25 or 50 VAC in and 115 or 230 VAC out
As a step-down or step-up transformer
5. 2 coils in series of 2 x 115 VAC = 230 VAC in, one of those coils 115 VAC out
6. Reverse of no 5 above, i.e. 115 VAC in (single coil) to 230 VAC out (2 x 115 VAC coils in series)
Other combinations are possible.
In pristine condition - as new. Was in a video artwork that didn't sell.