Features 1、Guitar Equalizer: Designed to amplify the sound of your acoustic guitar with its 4 band EQ equalizer, experience a richer and more balanced tone with precise control over bass, middle, treble, and brill. 2、LCD Display: The built in LCD tuner system allows you to easily tune your guitar, ensuring accurate pitch and optimal sound quality. Say goodbye to the hassle of using separate tuner, and enjoy effortless tuning with this equalizer. 3、Wide Frequency Response: With a frequency response range of 20Hz‑20KHz, this guitar pickup equalizer captures every nuance of your guitar sound, whether you are strumming chords or fingerpicking 4、Convenient Control: Provide ±12dB adjustment range for bass, middle, treble, and brilliance frequency. Easily tailor your guitar sound to your preferences, whether you want a warm and mellow tone or a bright and sparkling sound. 5、Easy to Use: This acoustic guitar pickup tuner is designed for easy installation and operation. Simply attach the pickup to the soundhole of your guitar, adjust the EQ controls to your liking, upgrade your guitar with this versatile tuner. Specifications: Item Type: Guitar Equalizer Input Impedance: 10MΩ Frequency Response: 20Hz-20KHz Control Range: Bass: ±12dB at 60Hz Middle: ±12dB at 500Hz Treble: ±12dB at 3KHz Brill: ±12dB at 10KHz Feature: LCD Tuner System Battery: 1 x 6F22 9V Alkaline Dry Battery (not included) Package List 1 x Equalizer 1 x Suction Cup 1 x Cable Tie 1 x Washer 1 x Guitar Pickup Stick 1 x Audio Cable 1 x Endpin Jack Cable 1 x Hex Thin Nut 1 x Circular Jack Cover 7 x Screws