Very easy to install and sounded good through different amps. Plug Dia. : 6.35mm/0.25 inch; Cable Length(Approx.) : 35cm/ 13.78 inch. Suitable for Guitar Violin Ukulele Mandolin Banjo Cigar box Guitar. With the advantage of being able to eliminate interfering external sounds and not be influenced by sound reflections from nearby objects. Material:Metal COLOR:black The sound pickup is high-quality 27mm Piezoelectric ceramic disc transducer It is very and can collect a wider range of sound in case you are not where are the parts of the sounds. This is a pre-wired, pre-soldered piezo and 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 . Then you're done! Fit for string music instruments such as Guitar Mandolin Cigar box Guitar Violin Ukulele Banjo, etc. Installation instruction: 1 Take the plastic film 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 tonal response 3 Drill a hole from inside the body, loosen -pin nut, insert it to the hole and tighten the nut The above procedures on different instruments. Cable long : approx 32cm Plug Dia: approx 6.35mm/0.25 inch Package included: 1x pickup 4x gasket 1x knob Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.