Everything you need in a pedal tuner is here in one affordable pedal. Perfect for bass or guitar players. Comes with the option of a strobe or needle visual for your preferred method of tuning. Awesome for live gigs and makes switching between tunings stress free. You will need an additional patch cable and you will need to purchase a 9v power supply for it; not a deal breaker to me there is one available on the Sam Ash site and in the store. Would definitely recommend to my musician friends.