Features: 1.[SPEAKER SIMULATION] The speaker simulator can reproduce the sound of the guitar speaker cabinet with good simulation effects. 2.[WITH EQUALIZER] With full 3 band equalizer and voice knob, adjust the equalizer and overdrive response, can simulate a variety of amplifiers. 3.[6 KNOBS ADJUSTMENT] With 6 adjusting knobs, namely Low, Mid, High, Level, Voice and Drive, with good practicability. 4.[METAL MATERIAL] The shell is made of metal material, with paint finish, hard and wear resistant, not easy to corrode. 5.[WITH LED LIGHT] The simulation effect has small LED flash to indicate the working status, with simple operation. specification:Item Type: Speaker Simulator Color: Golden Material: Metal Input Impedance: 1M Output Impedance: 1K Working Current: 6mA Power Supply Mode: 1 x 9V battery 6F22 (not included), 9V power adapter (not included) PackageList:1 x Speaker Simulator Effect 1 x User Manual