352377 Brand new and high quality Suitable for acoustic musical instrument To let your acousitc instrument turn into electro-acoustic one 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 Material: metal + plastic Color: black Dimension: about 74 cm 1 x Pickup