Estone Acoustic Guitar Pickup Piezo Transducer Jack For Guitar Violin Ukulele Mandolin This Transducer pickup which has been specially designed for acoustic instruments, is a very little device lets you turn your acoustic into an electro-acoustic, giving your instrument a new lease of life for amplification purposes Fit for almost string music instruments such as guitar ,violin ,mandolin ,banjor etc Length: 46cm Jack :6.35 single audio Color: Black