Joyo JF-323 Wooden Sound Acoustic Simulator Electric Guitar Single Effect Controls: High, Mid, Bass and Volume. True Bypass Input Impedance:1m Ohm Output Impedance:50k Running Current 22mA Power: DC 9V adapter (negative polarity) Dimensions 73(L) * 43(W)* 50(H)mm Plug in 9v DC Adapter (not included) JF-323 Wooden Sound Acoustic Simulator, NEW mini Guitar effects pedals from JOYO.