Our New Leolani Stick-on External Pickup is an easy and affordable way to allow your instrument to connect to an external amp. Just stick on the ukulele and plug into the amp and you're ready to go! Three knobs on the pickup control volume, bass, and treble. Allowing you to get the sound you want. Runs on CR2025 batteries that amplify the sound. Well designed circuits block out noise interference. High-tech vinyl allows for repeated use on sticking the pickup to the instrument. Battery life is about 30-40 hours.