The back says 60Hz, 40 Watts Max.
Basically this has a plug for a standard outlet, and then a positive and negative screw on the back, where you attack the wires for the output.
I don't remember what I paid for it 10 years ago, I just know it will cost me about $10 for a box and shipping.
I always held onto it thinking I might use it, but I haven't used it in 10 years.