Headphone Amplifiers descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Jf-14 American Sound Effects Pedal Amplifier Simulation With Voice Control. Features: Reproduces the Sound of a for Fender 57deluxe Amp. It Can Perfectly Perform from Original Sound to Overdrive. Performs Great from Clean, Driven, and Everywhere in Between. True Bypass Design Electric Guitar Single Effects Pedal. Aluminum Alloy Casing with Stoving Varnish Finish. Connect the Input Jack with the Guitar Tightly, and the Effects Pedal Will Start Working Then. LOW: Adjust the Low Frequency MID: Adjust the Middle Frequency HIGH: Adjust the High Frequency VOICE: Adjust the Frequency Response and the Distortion; Together with the Adjustment of DRIVE, It Can Simulate Many Kinds of Amplifier DRIVE: Gain Control LEVEL: Adjust the Output Level Specifications: Material: Aluminum Alloy Effect Pedal Size: Approx. 12 * 9 * 5.5cm Input Impedance: 1M Ohms Output Impedance: 1K Ohms Running Current: 3.8mA Powered By: 1 * 6F22 9V Battery / DC 9V Adapter (neither Included) Weight: 0.46kg Package Included: 1 * Joyo JF-14 American Sound 1 * User Manual . Products number : SOMONO94874