Multiple colors can be gripped with clips Tunning mode: chromatic scale, guitar, bass, ukulele, violin High precision: The high-sensitivity vibration tuner is fast, ignoring background noise, making it perfect for loud, CHAOTIC environments. Pitch calibration from 430 Hz, 450 Hz Large LCD dispay and easy viewing: In chromatic mode, the display shows the name of the note; in guitar, bass, violin and ukulele mode, the display shows the serial number, paying attention to the name. Mini Design: The guitar tuner is as small as a coin, and you will easily be a mini-design, carry it with your guitar bag. High quality and environmentally friendly ABS application, scientific design, and exquisite craftsmanship ensure that it will not break.The operation is very simple, with only one button controlling everything: turn on/off and set the tuning mode according to your instrument.The tuner head rotates 360 degrees to check your convenience reading; suitable Automatic shutdown, saving energy without signal detection for 3 minutes. Tuning process: 1. Press and hold the power button for 2 seconds to turn the tuner on (off). 2. Keep pressing the power button to select the tuning mode for the lens, guitar, bass, violin, ukulele. 3. Clip the tuner to your instrument. 4. The game ticket notes on your instrument, the note name (and string number) will appear on the display, the screen color will change, and the instrument moves. The backlight will change color; the middle and the meter bracket: pay attention to the tone The backlight remains white; the meter is left or right: a flat or sharp point of attention specification: Tuning range: A0 ( 27.5Hz ) ~ C8 (4186Hz ) Tuning range: chromatic scale, guitar, bass, violin, ukulele, banjo, mandolin Accuracy: ± 3cent A4 size: 430 Hz- 450 Hz Colour: Black Power supply: 3 V Colour:black Material:ABS LCD dimention : 2 x 2.3 cm 7/8inch : 1.1 ( W ) x1.46 ( D ) x1.89 (height) cm Package Contents: 1* Tuner 4* Picks (random colors, no color specified)