Features:<br> Full metal shell, durable and exquisite.<br> 3 controlling knobs and 1 switchare accurate and high sensitive.<br> Level knob: Adjust the effects level or volume.<br> Speed knob: Adjust the speed of modulation.<br> Depth knob: Adjust the depth of effects.<br> 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.<br> Output jack: 1/4" mono audio jack for signal output.<br> Input jack: 1/4" mono audio jack for connecting guitar.<br> True bypass footswitch and lever designed to prevent stamping on operation knobs.<br> Specifications:<br> Model: AROMA AMS-3<br> Effect: Ensemble<br> Material: Aluminium Alloy<br> Input Impedance: 470K Ohms<br> Output Impedance: 100 Ohms<br> Current Draw: 68 mA<br> Power supply: AC Adapter 9V DC (not included)<br> Item Size: 9 * 3.8 * 4.8cm / 3.5 * 1.5 * 1.8in<br> Item Weight: 151g / 5.3oz<br> Package Size: 12 * 7 * 6.5cm / 4.7 * 2.7 * 2.5in<br> Package Weight: 241g / 8.5oz<br> Note:<br> Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.<br> Package List:<br> 1 * Guitar Effect Pedal<br> 2 * Adhesive Tape<br> 1 * User Manual (English & Chinese)<br> 1 * Hardcover Box