It is especially designed for guitar tuning. Easy to use,just clip it to the position where vibration is more obvious on the instruments. Built-in vibration sensor. 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. Standard jack dimension. Jack: 6mm(appo) Cable length: 82cm Colour:black Material:plastic Package Included: 1 x Pickup folder (Guitar Tuner Not Included) Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Komplain Diangap Tidak Sah Jika Tidk Melampirkan Vidio Unboxing