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 patch transducers, easy to install and stick that onto the instrument to minimize the damage to instrument body. Simple to install, easy to operate, and does not require a battery, just plug it into your amp, bass amp or other recording equipment. You can amplify your guitar, mandolin, banjos, violins, ukulele, violas, cellos, and etc. Specifications: Material: ABS+Metal Color: As The Picture Shows Package Weight: approx.350g Size: approx.10x1.7x5cm/3.93x0.66x1.96in (More Size Detail, Please See Phot 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! Package includes: 1Pc x Piezo Guitar Pickup