The product is a power supply designed for guitar effect pedals, featuring 10 isolated outputs with options for 9V, 12V, and 18V. It is manufactured by Yueyinpu. Solid low noise unit very stable very quiet great for medium size. Pedal boards with 10 pedals or less. Perfect condition never used never installed. Seller has perfect ratings and ship fast and secure. I’ve been on eBay for over 27 years. Have fun!