Guitar Tuner QT-15 at DC Music Store. Thank you for your interest in the Guitar Tuner QT-15. An economy Guitar and Bass Tuner. Tunes electric, acoustic, and bass guitars. Also mandolins, banjos etc. Budget priced tuner with built in microphone for tuning acoustic instruments too!! Tuning E A D G B E Thank you for your interest in DC Music. With a friendly sales staff we'll do our best to provide you excellent service along with the lowest price. Feel free to contact us with any other information you might need. DC Music is the musician's store and staffed with musicians who want to help you find the right equipment for your needs.