Features:With this equalizer、 you spend less time tweaking controls and more time playing.Shape sound and eliminate feedback with 4 bands of equalization.Tone and volume control with frequency range from 20 HZ to 20 kHZ.With bass、 middle、 treble、 brillance、 volume、 miclevel control knobs.A better way to show your skill for it can assimilate the sound of your guitar board beating.The Hi-Fi microphone offers a better result to transfer sound.LCD display to show intonation for adjustment convenience.The battery check indicator will light when the power is low.1 pick to amplify the sound.1 small sticky plate helps to fix the power leads.4 mounting screws connect the guitar firmly.Connecting wire with 6.35mm plug.Powered by 6F 22 9V battery (not included).Specifications:Input impedance: 2.2M¦¸ Frequency response: 20Hz¡«20KHz Bass control: ©€/©12db at 80Hz Middle: ©€/©12db at 500Hz Treble: ©€/©12db at 3KHz Presence: ©€/©12db at 15KHz Brillance: ©€/©12db at 15KHzNote:The batteries are not included. Power supply: 9V AIkaline battery Item color: BlackItem size: 8 * 6 * 4.5cm / 3.1 * 2.4 * 1.8inItem weight: 96g / 3.4ozPackage size: Approx. 11 * 7 * 6cm / 4.3 * 2.8 * 2.4inPackage weight: 115g / 4.1ozPackage list:1 * EQ1 * Connecting Cable1 * Pick4 * Mounting Screws1 * Sticky Plate1 * Cable TieNote:The batteries are not included.