Color: Sliver and black Material:Metal ,plastic Size:Diameter of cable into the hole 6.35mm cable length 78cm pickup diameter:3cm Installation is simple,no need to install, use immediately Pursue to reduce guitar acoustic A good partner in the showtime Installation Notes: Open the package, tear double-sided tape ,put the microphone pickup to the panel One side access the pickup, the other side directly inserted instrument speakers Fit for:Guitar, ukulele, etc. Package Contents: 1x Universal Transducer Only the above package content, other products are not included. Note: Light shooting 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.