Features: 1.This EQ pick-up equalizer system with 4 bands can be easily fitted into your acoustic guitar and it is essential to electrify and amplify their sound. 2.Under the saddle pickup for acoustic guitar. Pre-wired design for easy assembly 3.4 bands plus volume control. 4.Supplied with a battery box, Low battery indicator. 5.Connecting wire with 2.5mm plug included specification: This EQ pick-up equalizer system with 4 bands can be easily fitted into your acoustic guitar and it is essential to electrify and amplify their sound. Under the saddle pickup for acoustic guitar. Pre-wired design for easy assembly 4 bands plus volume control. Supplied with a battery box, Low battery indicator. Connecting wire with 2.5mm plug included. s: Condition: 100% Brand New and High Quality Material: Plastic Color: Black Presence Control: 12dB at 8KHz Bass Control: 12dB at 600Hz Middle Control: 12dB at 600Hz Treble Control: 12dB at 2.2KHz Frequency Response: 20Hz - 20KHz Power Supply: 9V alkaline battery (Not included) Size: approx. 102 x 60 x 45mm / 4 x 2.3 x 1.7inch Weight: Approx. 129-139g Package Included: 1 x Guitar Pickup with Pin or without Pin 1 x Sticker 1 x Ribbon 1 x Piezo Pickup 4 x Screws 1 x Screw Nut 1 x Washer