D'Addario NS Artist Capo with NS Micro Headstock Tuner Capo and Tuner bundle Capo designed for use on 6-string electric and acoustic guitars The capo's patented Tri-Action geometry offers easy use and even clamping tension The NS Micro has a built-in piezo transducer picks up instruments vibration rather than sound Tri-color reversible backlit LCD screen makes it easy to tune in dark environments while allowing mounting in front, behind headstock, or on the NS Artist Capo