Color:Black; Tuning: Chromatic Guitar Bass Ukulele Violin; Tuning way: Clip; Tuning rang: A0(27.5Hz)~C8(4186Hz); LCD Screen size: 2.6 x 1.8cm; Operation: 1. Press the power button and hold on to turn on(off)the tuner. Press the power button continuously to select turing item out of Chromatic Guitar Bass Ukulele and Violin. 2. Clip on strongest vibrating part of your instrument. 3. Play a single note the display will show the note name and the meter moves. If intonation indicator points to the left: the note is flat. If intonation indicator points to the right the note is sharp. If intonation indicator points to the middle the note is in Tune. 4. The unit will shut off automatically if there is no signal within 5 minutes. 5. The unit will self-motion memory last time your setting If reinstall the battery the unit automatic return to initial setting.