Joyo JF-308 Golden Face Electric Guitar Single Effect Controls: Tone Gain / Drive Mid Boost /Voice Volume Specifications: True By Pass Input Impedance: 1m Output Impedance: 10k Running Current: 25mA Power: DC 9V negative polarity adapter, not supplied. Plug in 9v DC Adapter (not included) JF-308 Golden Face, NEW mini Guitar effects pedals from JOYO.