Rdjumpdjo 1pcs Black Universal Guitar Acoustic Pickup Clip & 1 set Acoustic Guitar Pickup Piezo Transducer

Easy to use,just clip it to the position where vibration is more obvious on the instruments. 1pcs Pickup folder (Guitar Tuner Not Included) & 1 set Acoustic Guitar Pickup Piezo Transducer with pickup main part, glue block , tie , gasket ,nuts,material: ABS & plastic Built-in vibration sensor. It is especially designed for guitar tuning. The clip is built-in vibration sensor which could make a response to vibrations,then transform them to electric signals and deliver them through cable to the tuner.