Yuker&reg; YK-46032 Hot Universal General Acoustic Guitar Bass Clip-line Pickup Tuning Microphone Mic Wire Cable Black 2.7ft Professional 100% Brand new and high quality; Especially designed for guitar tuning. Using it is easy,just clip it to the position where vibration is more obvious on the instruments. 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(Approx); Cable length: 82cm; Net weight:24.5g; Color:black