Product name:Guitar Tuner Product size about : 3.7*2.7*4.2cm/1.45*1.06*1.65in Product color: As shown in the figure A4 base frequency 440Hz Product material:ABS product features: 1. Colorful Screen: The tuner features a vibrant and easy-to-read color screen, making it simple to see and adjust the tuning of your instrument. 2. Type-C Charging: With a convenient Type-C charging port, this tuner can be easily recharged for extended use, eliminating the need for disposable batteries. 3. Versatile Rotation: The tuner's design allows for FREE rotation, making it suitable for use with guitars, violins, and other string instruments, providing flexibility and ease of use. 4. Twelve-Tone Equal Temperament: This tuner is equipped with a twelve-tone equal temperament function, ensuring accurate and precise tuning according to the standard tuning system. 5. Multi-function Tuning: In addition to its tuning capabilities, this tuner offers a range of other useful functions, making it a versatile and essential tool for musicians. Precautions: 1. As we know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Guitar Tuner