ITEM NAME:Acoustic Guitar Ukulele Mandolin Banjo Pickup Piezo Jack Disc Transducer Descriptio n Description: 100% brand new and high quality Suitable for acoustic musical instrument To let your acousitc instrument turn into electro-acoustic one Specification: Material: metal + plastic Color: black Dimension: approx. 77 cm 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 Above the procedures for referring depends on different instrument Package included: 1 x Pickup Note: 1.Please allow a little size error due to manual measurement. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! Acoustic Guitar Ukulele Mandolin Banjo Pickup Piezo Jack Disc Transducer.2 Place the transducer through the sound hole to the lower part of the front body where the guitar produces the best tonal response. 1 Take the plastic film down from the back of transducer to expose the adhesive.