1. Excellent Sound Quality: This acoustic guitar pickup, allows for easy adjustment of the guitar's tone, ensuring accurate and professional performance. With its built-in tuner function, you can conveniently adjust the pitch at any time to precision in your playing. 2. Feedback Reduction: The phase switch on this wooden guitar pickup effectively reduces feedback issues that may arise during live performances, providing clear and crisp sound quality. You can now enjoy playing without worrying about unwanted noise or interference. 3. Customizable Tone: Featuring volume, bass, middle, and treble control switches, this pickup allows you to personalize each frequency range according to your personal preferences and music style. Create sounds and add character to your performances effortlessly. 4. Authentic Acoustic Experience: Designed with an original-circuitry, this classical guitar pickup accurately reproduces the natural sound of your instrument, delivering a genuine acoustic experience. Every note resonate with clarity and authenticity, enhancing your overall performance. 5. Convenient Power Supply: This guitar pickup operates using a DC 9V battery (not included), providing long-lasting power for extended playing sessions. Enjoy the convenience of a portable power supply without compromising on sound quality or performance. Button: Tuner/Phase Knob: Volume/Bass/Middle/Treble/Pres Power Supply: Using DC 9V battery, but this product does not include. Pickup Hole Size: 6.8x4.6 cm/2.7x1.8 inch Battery Box Opening Size: 4.9x2.5 cm/1.9x1 inch Pickup Size: 7.5x5.1x3.3 cm/3x2x1.3 inch Battery Box Size: 6.1x3.5x5.7 cm/2.4x1.4x2.2 inch The silk screen printing and some parts details on the product may be different, which not affect the use. Color:As Shown Material:plastic Package Contents: 1 * Guitar Pickup Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.