Features: The Joyo British Sound JF-16 get tones inspired by amps--everything from Bluesbreaker to Plexi Roar 6 Controls for shaping EQ and overdrive response: Low, Mid, High, Level, Voice, and Drive. Quality components, true-bypass wiring. Sturdy aluminum alloy case. Specifications: Model: JF-16 Color: Purple Material: Aluminum alloy Input impedance: 1M Output impedance: 1K Running current: 3.8mA Power: 6F22 9V battery / DC 9V adapter (Neither included) Item size: 12 * 9.6 * 5.7cm / 4.7 * 3.8 * 2.3in Item weight: 395g / 13.9oz Package size: 13 * 10.4 * 6.2cm / 5.1 * 4.1 * 2.4in Package weight: 435g / 15.3oz 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 * Effect Pedal 1 * User Manual (English & Chinese)