Features: Patented Cartoon fashion Styling design;  360?? Swivel Clamp;  Dual-color display backlight changes (pitch/low screen display white;  Sound on time show green);  In a noisy environment, tuning is still accurate;  Tuning, precision, quick response;  LCD display with bright back and clear handwriting;    Specification: School Sound mode:12 Average Law/erhu/Guzheng/Pipa (Chinese subtitles), guitar/ukulele/bass/violin (display letter);  School Sound Range:A0 (27.50Hz)-c8 (4186Hz);  Pick tone mode:Vibration pick up sound;  A4 Value:440Hz;  Reaction speed:20 millisecond;  Tuning accuracy:??1 sound points;  Battery:3V (CR2030 button battery,not included);    Suitable for Musical instruments:erhu/guzheng/Pipa/guitar/ukulele/bass/violin and other musical instruments;  Packing:Blister;    Package content: Tuner*1