Aomig Guitar Tuner Clip On Digital Electronic Tuner Metronome Tuner for Acoustic Classical Guitar Bass Violin Ukulele and Other Stringed Instruments Rotatable Accurate Musical Tuning Accessory Product description FEATURES: This digital electronic tuner is designed for double bass, violin, ukulele and other string instruments. Easy to read, rotatable, flexible and lightweight. It can tune precisely and accurately even in a noisy environment. It is easy to operate and provides an accurate tuning experience. It is a must-have accessory for guitarists and other string musicians. SPECIFICATIONS: 1. Weight: 15g 2. Product size: 2.5x4.2x4.5cm 3. Tuning method: vibration tuning 4. Tuning accuracy: plus or minus 0.5 cents 5. A4 calibration: 440HZ 6. Product material: plastic shell 7. Power supply: CR2032 button battery x1 8. Color: black 9. Tuning items: ukulele/guitar/bass/violin/equal temperament 10. Packing list: tuner x1, battery x1, screwdriver x1 5 tuning modes available: C=chromatic G=guitar B=bass V=violin U=ukulele In chromatic mode, the display shows the note name. In guitar, bass, violin and ukulele modes, the display shows the string number and note name. How to use the tuning function: A. Set the machine to the state you need according to ""06 Button Functions and Operation Methods""; B. Clip the tuner clip on the headstock to make the vibration transmission effective, and adjust the angle of the display screen to a position that is easy to observe; C. Make the instrument vibrate, the machine will display the note name and indicate the pitch. When the pointer is to the left and the display screen is bright blue, the sound is low. When the pointer is to the right and the display screen is bright red, the sound is high. When the pointer is centered and the center point appears yellow, the sound is accurate. NOTES: 1. The machine must be fixed on the instrument when tuning. 2. Do not disassemble, modify, or repair the machine without authorization. 3. Do not use this machine in high temperature, humidity, dirt, or strong vibration.