Worked as a tuner and metronome, a good helper for beginners. Small and exquisite appearance, convenient to carry. Super bright backlight, LCD display (3.7 * 2.3 cm), provides excellent visibility. 360-degree rotatable clip, adjustable to your preferred angle, simple and practical. Equipped with a clip for easy attachment to instruments. Auto power-off function turns the device off automatically after 5 minutes of inactivity. Suitable for tuning guitar, chromatic, bass, violin, and ukulele C. Material: Plastic Tuning Accuracy Indicator: Low: Indicator points to the left, showing orange; High: Indicator points to the right, showing orange; In tune: Indicator points to the middle, showing green. Color: Black Tuning modes: Chromatic, Guitar, Bass, Violin, Ukulele C Tuning range: A0 (27.5 Hz) - C8 (4186.0 Hz) A4 frequency: 430–450 Hz Beat: 0–9 Tempo: 30–250 bpm Precision: ±1 cent Power: 1 x CR2032 battery (battery not included) Power consumption: Tuning mode: less than 12 mA; Metronome mode: less than 20 mA Display size: Approx. 3.7 x 2.3 cm / 1.5 x 0.9 in Product weight: 32 g / 1.1 oz Package List: 1 x Electronic tuner 1 x User manual (English) Only the above package content is included; other items are not included. Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3 cm.