JOYO JMT-01 Clip on Tuner & Metronome with Color Display for Guitar, Bass, Violin, Ukulele and More East-to-use clip on Tuner and Metronome, easy-to-read full color display.Display rotates 360 degrees for easy viewing Display rotates 360 degrees for easy viewing, support MIC and Clip tuning modes It has tuner, metronome and TAP tempo metronome functions, more accurate, high sensitive and wide tuning range Power off automatically for saving the battery Tempo: 30-250 bmp. A4 frequency: 410-450Hz. Tolerance : +-1 cent