Functions: Full metal coating, durable and exquisite. The 3 control knobs and 1 switch are accurate and very sensitive. Dry knob: Adjust the volume of the dry signal. Wet knob: Wet signal volume control. Range knob: Select the height offset range. In Detune mode, the range is: -25 or -20 or -15 or -10 or -5 or 0 or 5 or 10 or 15 or 20 or 25 cents. Switching mode: switch between up, down and down mode. Output jack: 1 or 4" mono audio jack for signal output. Input jack: 1 or 4" audio jack for guitar connection. True Bypass footswitch and lever designed to prevent stamping on operating knobs. Technical data: Model: AROMA AHAR-3 Effect: Pitch Shifter Material: Aluminum Alloy Input Impedance: 470 K ohms Output Impedance: 100 ohms Current Consumption: 68 mA Item Size: 9 x 3,8 x 4,8 cm or 3,5 x 1,5 x 1,8 inch Product Weight: 151g or 5,3oz Package Size: 12 x 7 x 6,5 cm or 4,7 x 2,7 x 2,5 inch Package Weight: 245 g or 8,6 oz Use a 9V power supply whose polarity is a positive pole on the outside and a negative pole on the inside. Otherwise, the product may not work properly. List of packages: 1 x Guitar Effect Pedal 2 x Adhesive tape 1 x User Manual (English and Chinese) 1 x Hardcover Box