This Pesa RCP - XY Rotary Control Panel doesn't come with a power supply. The selection knob is cracked but still works well.

Using this Pesa RCP - XY Rotary Control Panel is straightforward. Just turn the selection knob to make your choices, even though it's a bit cracked. Remember, you'll need to provide your own power supply. For maintenance, keep it in a dry place and clean it gently with a soft cloth. If you notice any problems with the knob, don't force it, as it might cause more damage.