FITS FOR: The pickup is suitable for many kinds of acoustic instruments, such as guitar, ukulele, mandolin, banjo, etc. GOOD SOUND: It is to eliminate interfering external sounds and not be influenced by sound reflections from nearby objects. So it can transmit good sound quality. 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. NICE AUDIO JACK:The audio jack can replace pin and install the strap. Condition: Weight: . 36g Installation 1. Remove the tail nails and widen the tail holes to the appropriate width (about 1-1.5cm in diameter) (without tail nails, find the right position to open the hole) 2. Stick the patch to the position that is most acceptable for vibration, usually below 3. Attach a fixing pad to the appropriate position and fix the long connecting wire to the fixing pad with a fixing strip. colour:black Material:Metal + ABS size:Cable Length: . 60cm / 23.6in Jack Size: 6.35mm Pickup Diameter: . 3cm / 1.2in Package Contents: 1 x Pickup Piezo 1 x Cable Tie 1 x Block Only 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.