product features:<br />100% ， never used<br />item 100% like the picture shown<br />tuning items：chromatic， guitar、bass、violin、ukulele<br />input method : clip<br />tuning mode：auto<br />tuning range：27.5hz-1760hz<br />a4 frequency range：440hz<br />tolerance：less than ≤0.50 cent<br />color: black<br />power：one cr2032<br /><br />package include:<br />1 x digtal tuner<br />1 x english user manual<br />1 x button battery