Compact easy-to-use & reliable. The Boss TU-03 is a high-performance chromatic tuner with an advanced metronome built into one little piece of essential kit. Youre certain to find the TU-03 useful whether rehearsing performing live or recording. The Boss Clip-On Tuner is designed to clip-on to most stringed instruments including a guitar bass or ukulele. Clip-on to your headstock & choose from five different tuning modes including chromatic guitar bass ukulele & violin. An advanced metronome offers either patterns & ten beat variations perfect for improving your timing. Furthermore its spring loaded clip & flexible pad ensures secure & stable attachment to your headstock. This high-performance Boss tuner combines incredible tuning accuracy with a compact unit that is designed & built to last.