I only went back ten minutes the first time. At first I thought it hadn’t worked. When I increased the voltage, I went back a year. I could tell because my wife’s things were still in the house.
The third time, I went back twenty years. I borrowed some clothes from whoever it was who lived there then, and took a walk. Within a minute, a car almost ran me down. Then another. Then a truck. The drivers couldn’t explain what happened.
I’m going back to my own time now. I think the universe is trying to edit me out.