Features: Profeional instrument tuner---AROMA AT-101 mini clip-on digital tuner. Widely used, suitable for tuning chromatic, guitar, ba, 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: Brand: AROMA Model: AT-101 Tuning Items: Chromatic(C), Guitar(G), Ba(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 / 0.9ozPackage List: 1 * AROMA AT-101 Clip-on Tuner 1 * User Manual (English)Note:Battery is not included.