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 360 Degree swivel clamp, battery integrated 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 it's fashionable cartoon shape, very suitable for your lovely kids, child. Product Name: Cartoon for alien styling tuner Brand: Swiff In a noisy environment, tuning is still accurate.Tuning, precision, quick response. LCD display with bright back and clear handwriting Pick tone mode: Vibration pick up sound A4 Value: 440Hz Reaction speed: Less than equal 20 millisecond Tuning accuracy: +/-1 sound points Battery: 3V (CR2030 button battery) Colour:Green Material:ABS Size:16.9x10.8x3.3CM Package Contents: 1 * Tuner Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.