Step up!
This is the accessory you must not do without if you have a RH450, RH750, Staccato51 or Blacksmith amplifier - simple and simple.
Essentially, you get a super convenient tuner display right to your feet, a mute switch and three preset foot switches for instant access to the presets you created on the amplifier.
Oh, and it draws its power directly from the amplifier, so no power supplies or batteries. Should we just wait here while you buy one?