Could you provide more information on this? I have never seen one of these, let alone heard of it...like what is it supposed to do? More information on the product will help your bids out as well. Thanks!
A capo (short for capotasto, Italian for "head of fretboard", also called a fret lobster) is a device used on the neck of a stringed (typically fretted) instrument to shorten the playable length of the strings, hence raising the pitch. It is frequently used on guitars, mandolins, and banjos. G.B. Doni first used the term in his Annotazioni of 1640, though capo use likely began earlier in the 17th-century.[