Features 1,[Versatile Sound Effects]: This guitar pickup is equipped with a variety of sound effects, allowing you to customize your tone according to your personal preferences. With its acoustic design, it captures the delicate nuances of sound, making your performance more realistic and immersive. 2,[Personalized Adjustments]: In addition to the standard BASS, MIDDLE, and TREBLE controls, this pickup also features PRES highfrequency control and MIC.PI, allowing for personalized adjustments to meet different playing requirements. This ensures that your music is diverse and expressive, enhancing your overall musical experience. 3,[Builtin Microphone Function]: With its builtin microphone function, this pickup not only amplifies the sound but also captures it simultaneously. This makes it perfect for combining singing and playing, providing a versatile solution for both live performances and practice sessions. 4,[Compact and Portable]: Designed to be lightweight and easy to install, this pickup is highly portable, making it suitable for various occasions. Whether you're performing on stage or practicing in the studio, it delivers powerful functionality without compromising convenience. 5,[Wide Compatibility]: Compatible with acoustic guitars, this wooden guitar pickup is a great addition to any classical guitar setup. It ensures accurate and coordinated performance, allowing you to achieve precise and harmonious results. Specification Button: Tuner or Phase Knob: Volume or Bass or Middle or Treble or Pres or MIC.PI Power Supply: Using DC 9V battery, but this product does not include Product Color: Black Pickup Hole Size: 6.9 x 4.7 cm or 2.7 x 1.8 inch Battery Box Opening Size: 4.9 x 2.5 cm or 1.9 x 1 inch Pickup Size: 7.6 x 5.2 x 3.1 cm or 3 x 2 x 1.2 inch Battery Box Size: 6.1 x 3.5 x 5.7 cm or 2.4 x 1.4 x 2.2 inch   Package List 1 x Guitar Pickupbr or 1 x Battery Boxbr or 1 x 4P Wirebr or 1 x Pickup Stickbr or 1 x Tie Bucklebr or 1 x Zip Tiebr or 13 x Screw Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.