Professional instrument tuner--- AT-101 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 . 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. clip part can be rotated 180 degree for positioning proper angle of the LCD screen. Super anti-interference. and stable. Turner picks up the sound by vibration. Brand: Model: AT-101 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) Colour:black :ABS Package Contents: 1 x Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.