Pre-wired piezo mic save time for you, easy to install, convenient to useYou can attach the piezo in or on your build, drill a hole and mount the jackDrill a hole from inside the body, loosen the end-pin jack nut,insert it to the hole and tighten the nutVery easy to install and sounded good through several different amps, No Soldering Required, No Battery RequiredWith the advantage of being able to eliminate interfering external sounds and not be influenced by sound reflections from nearby objectsSpecification:Type: 1 to 2Pickup Dia: 30mm/1.2inchColor: BlackPlug Hold Dia.: 6mm/0.24inchPlug Thread Dia.: 12mm/0.47inchCable Length(Approx.): 55cmMaterial: Plastic+ MetalCable Tie Size: 115x2mm/4.4inchx0.08inch(LxW)Tie Mount Base Size: 28x28x6mm/1.1inchx1.1x0.24inch(LxWxT)Package Included:1 x pickup1 x glue block1 x Cable tieOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.