3 in 1 metronome, digital tuner and tone generator for Guzheng. High-sensitivity vibration tuner responds fast, which ignores background noise, perfect for loud, chaotic environment. Clear LCD screen will give you effect. Clip-on Pickup and -in Microphone For Fine Tuning and Ease The precise tuner with headphone , input and volume control and light indicator. Automatic shutdown function: 5 minutes without operation, the machine will automaticlly off. Small and exquisite appearance, convenient to carry. Suitable as a gift for your , family or with others. : MT-70B Fit: for chromatic Guzheng Fine tuning: 1 Cent A4 range: 430 - 450HZ supply: 2 x AAA batteries (without included) Colour: black Material: plastic Package Contents: 1 x Guzheng Tuner Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.