This is a rod-style piezo, made to be installed beneath the saddle of a standard acoustic guitar as a pickup device. Simply build it into your bridge, or mount it inside the box under the bridge with glue, and you'll be amazed. at how much better it picks up the full range of tone when compared to a small disk piezo. Easy to install - no soldering required. Pickup Length: Approx. 2.75 inch / 7cm Width: Approx. 0.12 inch / 3 mm Cable Length: Approx. 13 inch / 32cm (Plug not included) Plug: 2.5mm This large piezo pickup is designed to fit into your bridge under the saddle of the acoustic guitar. It is a style of very high sensitivity piezoelectric transducers Pickups, the plug-in unit is directly compatible or pre-amplifier equalizer. colour:silver Material:metal Package Contents: 1 x Guitar Saddle Piezo Bridge 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.