3 in 1 metronome, digital tuner and tone generator for Guzheng. High-sensitivity vibration tuner responds quickly and ignores background noise, ideal for loud or noisy environments. Clear LCD screen provides excellent visibility. Clip-on pickup and built-in microphone for accurate tuning and convenience. Precise tuner features a headphone jack, input jack, volume control, and light indicator. Automatic shutdown function: powers off after 5 minutes of inactivity. Compact and sleek design, easy to carry. Suitable as a gift for friends, family, or others. Model: MT-70B Tuning type: Chromatic; Guzheng Fine tuning range: +/- 1 Cent A4 range: 430 ~ 450Hz Power supply: 2 * AAA batteries (not included) Color: Black Material: Plastic Package Contents: 1 * Guzheng Tuner Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3cm.