Product name:Guitar Tuner Product size about : 4.6*3cm/1.57*1.18in A4 base frequency 440Hz Power supply: RC2032*1 Product color: As shown in the figure Product material:ABS product features: 1. Multi-Instrument Tuner: This tuner is suitable for tuning a variety of instruments including guitar, ukulele, and bass. 2. A4 Standard Frequency: The tuner is calibrated to the A4 standard frequency of 440Hz, ensuring accurate and reliable tuning. 3. Easy-to-Read Display: The clear and bright display makes it easy to read and understand the tuning status of your instrument. 4. Convenient Power Source: The tuner is powered by a single RC2032 battery, which is easy to replace and provides long-lasting performance. 5. Compact and Portable: The small and lightweight design makes this tuner easy to carry with you wherever you go, ensuring you always have a reliable tuning tool on hand. Precautions: 1. As we all 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 feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pc Guitar Tuner