Features: Full metal shell, durable and exquisite. 3 controlling knobs are accurate and high sensitive. Volume knob: Adjust the output volume. Color knob: Adjust the tone. Speed knob: Adjust the speed of effects. Mode switch: Switch between 11 cabinet simulator effects bassed on for Vox, for Roland, for Mesa boogie. 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 ASR-3 Effect: Simulator 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: 146g / 5.1oz Package Size: 12 * 7 * 6.5cm / 4.7 * 2.7 * 2.5in Weight with Package: 240g   Package List: 1 * Guitar Effect Pedal 2 * Adhesive Tape 1 * User Manual (English & Chinese) 1 * Hardcover Box