Piezo Contact Pickup: The piezo pickup transducer system eliminates interfering external sounds and is unaffected by sound reflections from nearby objects, so it can transmit good sound quality. Wide Application: The acoustic guitar piezo pickup is suitable for many kinds of acoustic instruments, such as electric guitar, mandolin, banjo, violin, ukulele and so on. High Quality Material: The professional piezo contact pickups transducer is made of high quality material, which is sturdy and durable for long time use. SMD Design: The piezo contact microphone pickup has 3 SMD transducers, very easy to install, you can sticking it on the instrument to minimize damage to the instrument body. Audio Jack: The audio jack of the pickup can replace the end pin and install the strap. The sound of this pickup is very full, the highs are bright, the mids are warm and the lows are full, it has that "vintage" sound you want. Specification: Size: Diameter of cable into the hole 6.35mm Cable length: 78cm/30.71inch Pickup diameter: 3cm/1.18inch Material: metal rubber PP Package Includes: 1 Piece Acoustic Guitar Piezo Pickup Note: Please allow slightly errors due to manual measurement and different monitors.