Specification: Product Material: Copper Product Color: Brown Model: Single TrackProduct Size: 50 x 15 x 15mm/1.97" x 0.59" x 0.59" Range: Guitar, Acoustic Guitar, PickupHow It Works: Connect pickup (EQ) via terminal, 2.5/3.5 jack conversion jack connect 6.35 cable to reduce signal source to audio. Feature:1. Tail nail detachable, easy to install, do not use screws to fix, do not destroy the original sound and color of the guitar.2. The insertion and extraction force of the plug about 3.5kg, will be different for the plug with different shape.3. Installation only need to open the 12mm hole in the tail of the guitar, the tail nail and the nut, adjust the mounting height of the mounting nut.4. This product is completely enclosed working space, shielding effect, copper material, transmission effect is good. Note: Please allow 1-3cm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thank you for your understanding.1 x Guitar Output Jack