Turning 360 degree freely. Adjustable view angle.Super anti-interference. Handy compact digital clip-on style.Tuner picks up the sound by vibration. Easy to clip onto any stringed instrument.Sensitive and stable. Tuning Pitch Indicator Light:Low: Indicator to the left and LCD screen turns white; Hight: Indicator to the right and LCD screen turns white; In tune: Indicator to the middle and LCD screen turns green.Tuning mode: AutoTuning items: Chromatic， Guitar， Bass， Violin， Ukulele.A4 frequency: 440HZTuning range: A0(27.5HZ)-A6(1760HZ)Power supply: 1 x CR2032 cell button (not include)Color: BlackItem size: 3.5 * 4.8 * 5.4cmItem weight: 22g