Usage Tips: 2.5mm input jack, 6.35mm output jack. Copper chrome plating, stable current, clear tone, low loss. Audio input jack can be directly connected with bridge piezo pickup, while output jack connects to audio cable. Suitable for acoustic guitar refit, repair, replacement, and DIY projects for luthiers and instrument enthusiasts. Installation is convenient and does not require an equalizer or preamp. Color: Silver Material: Metal Package Contents: 1 x Guitar tail jack 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.