AROMA AMO-3 Mario Bit Crusher Electric Guitar Effect Pedal Mini Single Effect with True Bypass Features: Full metal shell, durable and exquisite. 3 controlling knobs and 1 switch are accurate and high sensitive. Mix knob: Adjust the ratio between dry signal and wet signal. Bit knob: Adjust the range of sampling depth reducing. Crush knob: Adjust the range of sampling rate reducing. Mode switch: Switch between low pass, high pass and normal mode. Output jack: 1/4" mono audio jack for signal output. Input jack: 1/4" mono audio jack for connecting guitar. True bypass footswitch and lever designed to prevent stamping on operation knobs. Specifications: Model: AROMA AMO-3 Effect: Bit Crusher Material: Aluminium Alloy Input Impedance: 470K Ohms Output Impedance: 100 Ohms Current Draw: 68 mA  Power supply: AC Adapter 9V DC (not included) Item Size: 9 * 3.8 * 4.8cm / 3.5 * 1.5 * 1.8in Item Weight: 149g / 5.2oz Package Size: 12 * 7 * 6.5cm / 4.7 * 2.7 * 2.5in Package Weight: 242g / 8.5oz 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 Pedal 2 * Adhesive Tape 1 * User Manual (English & Chinese) 1 * Hardcover Box