DSCTechnology 4pcs 24 Volt AC to 12 Volt DC Power Converter 1.5A Output

I first had purchased another brand with the removal screw terminal strip and had problems with noisy 12v Dc. They created horizontal rolling lines. I almost sent back the security cameras thinking they might be bad. I'm glad I ordered the ( DSC-AD01) converters. After replacing the 3 existing converters, my problems cleared up. Great product. Does what it is suppose to do, provides clean 12V DC.Time will tell if this is the only converter I will use.