The ART System (Adaptive Radius Technology) of the G7th Performance 3 capos adapt to the radius of your strings and fretboard to ensure equal pressure over all strings. This prevents tuning and noise and ensures the ideal string tension in every postiie and on every guitar neck. By simply squeezing to fasten and loosen, the Performance 3 capo gives you full and intuitive control over the pressure you put on your strings. Designed to be easy to use with one hand and as fast and easy to move as capos with a spring. Whether it's an acoustic or an electric guitar, the Performance 3 capo gives you control to keep the guitar in the right mood.