Westshell Guitar Tuner Clip-On Cartoon Alien with LCD Display for All Instruments with Bass, Ukulele,Violin Accessories (Green) Usefully--Press the power button and hold on to turn on(off) the tuner.Press the power button continuously to select tuning item out of Chromatic, Guitar, Bass, Ukulele and Violin One-handed 300 swivel clamp, battery intergrated in the clamp, easy for replacement Large LCD that's easy to read in the dark, changing backlight(Orange means flat/sharp and green means in tune) The unit will self-motion memory last time your setting,if re-install the battery, the unit automatically return to initial setting Creative Design: This item not only can achieve accurate tuning for professional musician, Also its fashionable cartoon shape, very suitable for your lovely kids, child.