5 Band EQ Equalizer Tuner Piezo Pickup Acoustic Guitar Pre wired Preamp Prener Features 1 Used for acoustic guitars who are looking to improve the sound 2 Easy to install & use 3 5 band tone controls BASS MIDD 1 MIDD 2 TREB PRES Specifications 1 Color Black Red 2 Material Plastic 3 Size 98x 58mm 4 Bass Control 12d B5 Middle 1 12d B6 Middle 2 12d B7 Treble Control 12d B8 Pres 12d B9 Power 6F22 DC 9V battery not included Package Included 1x Preamp 1x Connecting wire with 2 5mm plug 1x Mounting base with sticker 4x Screws 1x Washer 1x Hexagon screw nut 1x Cable tie