It's the power supply. No detectable hums, very precise voltages delivered, stable adjustments. Many cables provided. While being cautious before plugging in, a quick check with a "Métrix" to ensure everything is compliant is essential.

High-quality product! Its thinness allows it to slip under a D'Addario XPND pedalboard. Perfect shielding, electrical safety, the 660 mA power at 9 volts will allow you to get the best out of your pedals. Even though at first I found it a bit "expensive", honestly the price is quickly forgotten compared to all the low-end products on the market.

Perfect power supply for my pedalboard consisting of an hx stomp, a volume pedal and a neunaber reverb