Feature:1. ACCURATE AND CONVENIENT: Professional acoustic guitar equalizers with tuners can effectively improve sound for accurate and easy tuning, very convenient2. PERFECT REPLACEMENT: 4 band preamplifier piezoelectric pickups are an excellent accessory for electric and classical guitars, perfect for replacing old or broken ones3. APPLICABLE SCENARIO: With this equalizer, whether you're practicing at home, performing on the stage, or recording in the studio, you can easily tune your instrument anytime, anywhere4. DURABLE AND EASY TO INSTALL: Crafted from excellent plastic, this EQ is durable and long lasting. Compact design and easy installation make it suitable for musicians of all levels, from beginners to professionals5. WITH PICKUP: The acoustic guitar 4 band equalizer is equipped with piezoelectric pickups that provide superior sensitivity and minimal feedback, accurately controlling the tone and volume of your instrumentSpecification:Item Type: Acoustic Guitar 4 Band EqualizerMaterial: PlasticPower Supply: 1 x 9V 6F22 carbon battery(not included).Package List:1 x 4 Band EQ Equalizer1 x Battery Box8 x Screws1 x Tape1 x Connecting Wire1 x Guitar Pickup Stick1 x Suction Cup