Thank you for viewing. This is an adapter with the same specifications as the BLACKSTAR FLY3 power adapter (PSU-1). Input: AC100～240V - 50/60Hz Output: DC6.5V - 2.0A Polarity: Center Plus (Cord length: approx. 100cm) I connected it to my BLACKSTAR FLY3 amplifier (without Bluetooth) and didn't notice any particular problems. However, it is not a genuine product. Please be aware that this is a power adapter with specifications equivalent to those listed above. I already own another power adapter, so the item I am selling has only been tested for operation and is in "like new" condition. Thank you very much.