This is a kind of fine quality guitar sound pickup, pick up sound by being in direct contact with the sound source. Directly bonded to the instrument panel, 3.0M sticker, not to hurt the instrument. You can have a try. Features: Contact microphones pick up sound by being in direct contact with the sound source. Wide frequency response, low noise, accurately pickup sound of musical instrument. Enhance the sound of your musical instruments. It applies to folk, classical guitar and ukulele and so on. Posted in different parts of the instrument have different pickup effect . Directly bonded to the instrument panel, 3.0M sticker, not to hurt the instrument. It can be removed at any time, and then paste use. Without power, easy to install, cheap, pickup effect class ! Specifications: Name: Guitar Sound Pickup Device Cable length: 0.35m / 13.78in Pad diameter: 30mm / 1.18in Item weight: 24.8g / 0.87ounce Package size: 100 * 50 * 50mm / 3.94 * 1.97 * 1.97in Package weight: 30g / 1.06ounce Package list: 1 * Guitar Sound Pickup Device