Feature: 1. 4 SEGMENT PIEZOELECTRIC PICKUP: Professional pickup EQ support BASS, MIDD, TREB, PRES 4 segment plus volume control, you can fine tune your sound to perfection 2. SENSITIVE AND DURABLE: The 4 band equalizer enhance the sound of the instrument. Come with high sensitivity, stable performance, strong and durable 3. MUST HAVE ACCESSORIES: Equalizer is a beautiful pickup accessory for guitar lovers to keep your guitar in top condition all the time, accurately reproduce the natural sound of your guitar 4. DURABLE CONSTRUCTION FOR LONG LASTING USE: Made from excellent plastic, this EQ pickup enhancer is built to last, which can withstand the rigors of regular use without compromising performance 5. PORTABLE AND VERSATILE: This pickup enhancer is compact and lightweight, easy to take with you wherever you go. Whether you're gigging, practicing, or jamming with friends, you can effortlessly enhance your acoustic guitar sound on the fly Specification: Item Type: Acoustic Guitar 4 Band Equalizer Material: Plastic Control Range: Bass: ± 12dB at 60 HZ Mid: ± 12dB at 500 kHZ Treble: ± 12dB at 3 kHZ Presence: ± 12dB at 10 kHZ Power Supply: 1 x 9V 6F22 carbon battery(not included) . Package List: 1 x Equalizer 1 x Battery Box 1 x Suction Cup 1 x Connecting Cable 1 x Guitar Pickup Stick 1 x Cable Tie 8 x Screws