<p>1.product manual:</p> <p>l Suitable for musical instruments: guitar, bass, violin, ukulele, ukulele</p> <p>l Tuning range: A0 (27.5Hz)~C8 (4186.01Hz)</p> <p>l Accuracy: ±1cent</p> <p>l Power supply: 3V (including CR2032 lithium battery)</p> <p>lA4 frequency: 440Hz</p> <p>package instruction:</p> <p>lEach box (1 tuner, 2 screws, 1 user manual, 6 guitar accessories)</p> <p>lColor: black</p> <p>lWeight: 19g</p> <p>lSize: 5x2.6x7.6cm</p> <p>Material: ABS plastic</p> <p>2.product advantages:</p> <p>The ultra-bright full-color display makes it easy to see if you are in sync. Power saving function extends battery life</p> <p>3.After-sales guarantee</p> <p>If you buy a guitar tuner and feel that the quality problem is not satisfactory, you can return it to us within three months without paying a penny.</p>