Tuning modes: Chromatic(C), Guitar(G), Bass(B), Ukulele(U), Violin(V)<br> 2 color backlight: green-in tune, white-out of tune<br> Pitch Range: 440 Hz <br> Power Supply: 2032 coin battery<br> Detection accuracy:±0.5 cent<br> Weight:20g <br> Size:29x75x50mm<br><br> <b>Include Items: <br></b> One tuner used for Guitar,Bass, Ukulele, Violin,Chromatic<br> One Capo used for Guitar,Bass, Ukulele<br> Six 0.71mm thickness Guitar Picks,made of celluloid,<br> One picks holder<br><br> <b>Tuning Procedure<br></b> 1.Press the power tutton and hold 2 seconds to turn on(off) the tuner<br> 2.Press the power button continuously to select tuning mode out of Chromatic,Guitar,Bass,Violin and Ukulele.<br> 3.Clip the tuner onto your instrument.<br> 4.Play a single note on your instrument, the note name(and string number) will appear in the display.<br> The screen colour will change and the meter moves <br><br> Back light turns green ,and meter stands in th middle: note in tune<br> Back light styas white ,and meter points to left or right: Flat or sharp note<br><br> In Chromatic mode, the display shows the note name.<br> In Guitar, Bass, Violin, and Ukulele mode,the display shows the string number and the note name<br><br> <b>Power saving function: <br></b> If there is no signal inputs in 3 minutes after the power is on the tuner will turn off automatically<br> Any further quesiton please email to us , we will reply as soon as possible.