Features:Full metal shell, durable and exquisite.3 controlling knobs and 1 switch are accurate and high sensitive.Level knob: Adjust the effects level or volume.Speed knob: Adjust the speed of modulation.Depth knob: Adjust the depth of effects.Mode switch: Switch between 11 modulation effects of sine wave chorus, triangel wave chorus,positive flanger, negative flanger, jet flanger, vibatio, uni-vibe, vintage phaser, opto tremolo, bias tremolo and auto filter.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 AMS-3Effect: EnsembleMaterial: Aluminium AlloyInput Impedance: 470K OhmsOutput Impedance: 100 OhmsCurrent Draw: 68 mA Power supply: AC Adapter 9V DC (not included)Item Size: 9 * 3.8 * 4.8cm / 3.5 * 1.5 * 1.8inItem Weight: 151g / 5.3ozPackage Size: 12 * 7 * 6.5cm / 4.7 * 2.7 * 2.5inPackage Weight: 241g / 8.5ozPackage List:1 * Guitar Effect Pedal2 * Adhesive Tape1 * User Manual (English & Chinese)1 * Hardcover Box