Features: With this equalizer, you spend less time tweaking controls and more time playing. Shape sound and eliminate feedback with 5 bands of equalization. With bass, middle 1, middle 2, treble, pres control knobs. Tone and volume control. Wide frequency range from 20 HZ to 20 kHZ. Auto and manual tuning mode. LED for effect on/off and battery check. Easy to read metronome on LCD display. Powered by 9V Alkaline battery (not included). Specification: Input impedance: 2.2M Frequency response: 20 HZ - 20 kHZ Control range: Bass: 12dB at 60 HZ Midd 1 : 12dB at 500 kHZ Midd 2 : 12dB at 600 kHZ Treble: 12dB at 3 kHZ Presence: 12dB at 10 kHZ Package size: 12 * 12 * 8cm / 4.7 * 4.7 * 3.1in Package weight: 151g / 5.32oz Package List: 1 * 5 Band EQ Equalizer 1 * Battery box 1 * Piezo Pickup Line 8 * Mounting screws