Product name:Electronic tuner Product size about : 4.8*4.3*2.7cm/1.8*1.6*1in Battery: CR2032*1 Calibration accuracy: ±1 cent Calibration range: A0 (27.5Hz(C8 (4186Hz) A4 range: 440Hz Product color: As shown in the figure Product material:ABS product features: 1. Product size about: 4.8*4.3*2.7cm/1.8*1.6*1in, Battery: CR2032*1, Calibration accuracy: ±1 cent, Calibration range: A0 (27.5Hz(C8 (4186Hz), A4 range: 440HzThe electronic tuner has various functions and is suitable for instruments such as guitar, bass, violin, etc., helping musicians to tune accurately. 2. The uniquely designed clamping mechanism can be easily clamped on the instrument, which is stable and reliable and convenient to use when playing. 3. Built-in intelligent sensor, automatically turns on to recognize the sound of the instrument, and automatically enters the static mode after 5 minutes of no operation, saving energy and protecting the life of the equipment. 4. The display is clear and easy to read, providing accurate tuning guidance to help musicians quickly adjust the pitch. 5. It is equipped with an automatic shutdown function. When the musician finishes playing, the tuner will automatically shut down after a period of no operation, saving energy and protecting the environment. 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 contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Electronic tuner