Features:  Professional instrument tuner--- mini clip-on digital tuner.  Widely used, suitable for tuning chromatic, guitar, bass, violin and ukulele.  Double color backlit LCD screen. The product's shell is made from pretty food-grade PC material.  In-tune: indicator is on the middle, showing Green; Low: indicator is on the left, showing Blue; High: indicator is on the right, showing Blue.  Portable digital clip-on style, easy to clip onto any stringed instrument as mentioned above.  Its clip part can be rotated 180 degree easily for positioning proper view angle of the LCD screen.  Super anti-interference. Sensitive and stable.  Turner picks up the sound by vibration.     Specifications:  Tuning Items: Chromatic(C), Guitar(G), Bass(B), Violin(V), Ukulele(U).  Pitch Range: 440Hz.  Detection Range: A0(27.5Hz)-C8(4186Hz).  Tuning Way: Clip (tune by vibration).  Detection Accuracy: ±0.5cent.  Powered By: 1 * CR2332 Lithium coin battery (not included).  Item Weight: 18g / 0.6oz.  Package Size: 5.5 * 4.5 * 3.3cm / 2.2 * 1.8 * 1.3in.  Package Weight: 27g / 0.9oz.     Package Included:  1x Clip-on Tuner;  1x User Manual (English).