Those pedals are manufactured by Fatar in Italy and distributed in US by a company Music Industries. For your info, the single pedal has polarity switch that allows you change polarity for different brands of keyboards. However, the two and three pedal models do not have polarity switches - they are either "open" or "close" specifically. For information only, you can access the following URL:
http://www.musicindustries.com/fatar/fatar-access.htm

Here are how they look like:





I hope it helps,

Paul Ip
from Texas