5-band tone controls (BASS, MIDD.1, MIDD.2, TREB., PRES.) Used for acoustic guitars who are looking to improve the sound Pre-wired for easy assembly / Supplied with a battery box Includes connecting wire with 2.5mm plug / Low battery indicator It measures about 58mm wide, 98mm long and 67mm thick This pick-up equalizer system with 5 bands is essential for all acoustic guitars who are looking to improve the sound. It features an actual loudness contour control so that you can precisely determine the level of the contour and get the right sound . With this preamp, you spend less time tweaking controls and more time playing. Supplied with a battery box Bass Control: +/- 12dB Middle 1: +/- 12dB Middle 2: +/- 12dB Treble Control: +/- 12dB Pres: +/- 12dB Power: 6F22 DC 9V battery (not included) Package Includes:1 x Preamp 1 x Connecting wire with 2.5mm plug 1 x Mounting base with sticker 4 x Screws 1 x Washer 1 x Hexagon screw nut 1 x Cable tie Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.