50mm Guitar Pickup Piezo Transducer Prewired Amplifier with 6.35mm Output Jack for Acoustic Guitar Ukulele Cigar Box Features: brand new and high quality. The sound pickup is high-quality 50mm Piezoelectric ceramic disc transducer, very easy to install and sounded good through several different amps. With the advantage of being able to eliminate interfering external sounds and not be influenced by sound reflections from nearby objects. It is very large and can collect a wider range of sound in for case you are not sure where are the best parts of the sounds. This is a pre-wired, pre-soldered piezo and jack harness which make it easy for you. All you have to do is to attach the piezo in or on your build, drill a hole and mount the jack. Then you're done Fit for most string music instruments such as Guitar Mandolin Cigar box Guitar Violin Ukulele Banjo, etc. Installation instruction: 1. Take the plastic film down from the back of transducer to expose the adhesive. 2. Place the transducer through the sound hole to the lower part of the front body where the guitar produces the best tonal response. 3. Drill a hole from inside the body, loosen the end-pin jack nut, insert it to the hole and tighten the nut. The above procedures for depend on different instruments. Specification: Color: gold Material: metal Cable long: approx 42cm/16.5 inch Plug Dia: approx 6.35mm/0.25 inch Note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 1 Disc Piezo Pickup