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/ ukulele（C/ D）/ violin. Compact size, simple operation and accurate tuning. With LCD screen showing tuning information. 360° rotation, flexible to adjust screen position for better reading. With automatic shut-off function for battery saving. Long battery endurance, more time. Tuning : 0A-8C, Precision: ±1cent, C2032 Battery Included. Any problems, feel free to . Honor to serve you！ Specifications: Model: AT-07 Tuning Items: Chromatic/ Guitar/ Bass/ Violin/ Ukulele C/ Ukulele D A4 frequency: 440HZ Tuning : A0(27.5Hz) - C8 (4186.0Hz) Supply: 1 * CR2032 Battery (Included) Item Weight: 18g / 0.6oz Package Size: 7.4 * 6.2 * 3.8cm Package Weight: 29.98g Note: guitar showed in 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) Clip-on tuner for chromatic/ guitar/ bass/ ukulele（C/ 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.