1. FITS FOR: The pickup is suitable for many kinds of acoustic instruments, such as guitar, ukulele, mandolin, banjo, etc. 2. GOOD SOUND: It is to interfering external sounds and not be influenced by sound reflections from nearby objects. So it can transmit good sound quality. 3. STICK PATCH DESIGN: With 3 stick patch transducers, it is very easy to install and you can onto the instrument to minimize the damage to instrument body. 4. NICE AUDIO JACK:The audio jack can replace pin and install the strap. 5. INSTALLATION IS SIMPLE: no need to install, use immediately. Fit for:Guitar, ukulele, violin, etc. 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. Colour:Black & Silver Material:Metal+rubber+plastic Size:15cmx10cmx3cm, Diameter of cable into the hole 6.35mm, cable length 78cm, pickup diameter:3cm Package Contents: 1 x Pickup Only the above package content, other products are not included. Note: Light reflection 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.