This Class 2 Transformer from Wahl is the perfect fit for your clipper 9550. Tested to ensure proper function, it provides a steady output voltage of 3V. The barrel plug design makes it easy to connect. Made in China, this black transformer is a versatile addition to your collection of electronics. Its compact size and lightweight design make it easy to transport. Whether you need to power your clipper or any other compatible device, this transformer is a reliable and efficient choice.