Features: Piezo pickup is specially designed for small musical instrument, such as kalimba and other thumb piano. It uses non-marking glues, therefore which will not harm the Kalimba and other instrument paint panels. With 2 stick patches transducers, easy to install and stick that onto the instrument to minimize the damage to instrument body. You can amplify your guitar, mandolin, banjos, violins, ukulele, violas, cellos, and also other musical instruments. Simple to install, easy to operate, and does not require a battery, just plug it into your guitar, bass amplifier or other recording equipment. Specifications: Material: Plastic+Electronic Components Color: Black/Red Package Weight: approx.60g Size: As The Picture Shows Package Includes: 2Pcs Piezo Guitar Pickup note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!