This unit comes without a power supply. It has a couple of minor quirks. The range knob is a bit stiff to turn, and two of the knobs are missing their caps, but they still work just fine.

To use this Radial Engineering 8 - ohm Headload Guitar Amp Load Box, connect it to your guitar amp as you would a normal load box. Remember, it doesn't come with a power supply, so you'll need to sort that out on your own. When adjusting the knobs, be aware that the range knob might be a bit tough to turn. Don't worry if the caps on two of the knobs are missing, they'll still function properly. For maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture, which could damage the internal components. Regularly check the connections to ensure a good signal.