Features: Full metal shell, durable and exquisite. 5-band slider: Adjust the level of each frequency band. (-18dB~ #43;18dB) Level knob and on/off LED: Adjust the output level and indicate effects or bypass status of Bass EQ. Output jack: 1/4 #34; mono audio jack for signal output. Input jack: 1/4 #34; mono audio jack for connecting guitar. True bypass footswitch design. Specifications: Model: AROMA AEB-3 Effect: Equalizer Material: Aluminium Alloy Input Impedance: 470K Ohms Output Impedance: 1K Ohms Current Draw: 5 mA Power supply: AC Adapter 9V DC (not included) Item Size: 9 * 3.8 * 4.8cm / 3.5 * 1.5 * 1.8in Item Weight: 142g / 5oz Package Size: 12 * 7 * 6.5cm / 4.7 * 2.7 * 2.5in Package Weight: 236g / 8.3oz Note: Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Package List: 1 * Guitar Effect Equalizer 2 * Adhesive Tape 1 * User Manual (English Chinese) 1 * Hardcover Box