The tuner is great for beginners and professionals. It is fast, accurate, automatic and easy to operate. You would never play out of tune anymore with this tuner. Features: Clip-on tuner for chromatic/ guitar/ bass/ ukuleleC/ D/ violin.Compact size, simple operation and accurate tuning. With LCD screen showing the tuning information. 360 rotation, flexible to adjust the screen position for better reading. With automatic shut-off function for battery power saving.Long battery endurance, more enjoying time. Tuning Range: 0A-8C, Precision: 1cent, C2032 Battery Included. Any problems, feel free to contact us. Honor to serve you Specifications: Model: AT-07 Tuning Items: Chromatic/ Guitar/ Bass/ Violin/ Ukulele C/ Ukulele D A4 frequency: 440HZ Tuning Range: A0(27.5Hz) - C8 (4186.0Hz) Power Supply: 1 * CR2032 Battery (Included) Item Weight: 18g / 0.6oz Package Size: 7.4 * 6.2 * 3.8cm Package Weight: 29.98g Note: The guitar showed in the picture is not included. Ukulele C is for standard mode(4G 3C 2E 1A), while Ukulele D is one note higher(4A 3D 2F# 1 B). Package List: 1 * Tuner 1 * CR2032 Battery 1 * User Manual(Chinese & English)