Control Range:: +/-12dB at 60HzMiddle: +/-12dB at 500HzTreble: +/-12dB at 3KHzPresence: +/-12dB at 10KHzWith this preamp, you spend less time tweaking controls and more time playing.Tone and volume control.With volume, , middle, treble, pres control knobs.LCD display, easy to read.Powered by 6F22 9V battery(not Include)Low battery check LED.Auto and manual tuning mode.colour:blackMaterial:Plastic + metalsize:9.8*5.8*4cmPackage Contents:1 x 5 Band EQ Equalizer1 x Piezo Pickup Line8 x Mounting screws1 x Microphone1 x Battery boxOnly the above package content, other products are not included.Note: Light 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.