The tuner is great for beginners and professionals. It is fast、 accurate、 automatic and easy to operate. You would never play out of tune anymore with this tuner.  Features:<br> Clip-on design and support for 360¡ãswivel rotation. Helps you to find the accurate tuning of your instrument. Comes with LCD screen、 the string NO. and note name will be showed on the screen together when tuning.<br> The automatic shut-off function if no operation for about 3 minutes ensures that your battery works longer. Multi-instrument tuner、 great for electric、 acoustic bass、 guitars、 violin、 ukulele.  Specifications: Tuning Mode: Auto Tuning Items: Chromatic、 Guitar、 Bass、 Violin、 Ukulele A4 frequency: 440HZ Tuning Range: A0(27.5Hz) - C8 (4186.0Hz) Power Supply: 1 * CR2032 cell button (not included) Item Size: 4.4 * 3.5 * 3.5cm / 1.7 * 1.4 * 1.4in Item Weight: 25g / 0.9oz Package Size: 9.0 * 3.9 * 4.0cm / 3.5 * 1.5 * 1.6in Package Weight: 33g / 1.2oz  Package List: 1 * Mini Tuner 1 * User's Manual(Chinese !#!amp!*! English)  Note: Battery is not included.<br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>