Dr. J - D57 -AMOR BUFFER Guitar Pedal ARMOR BUFFER is an effect combining Buffer and Booster together. The Buffer is designed to reduce tone and dynamic loss caused by long cables, multiple FX pedals, or TRUE BYPASS connections. Built-in 2 groups of Buffer: In Buffer supports more effective and closer connection between your guitar and effect chain, keeping the original signal into the effects at maximum level; Out Buffer is connected between effect chain and amp system, making your output signal reach to your amp system perfectly. Additional Boost controlled by foot switch, provide you a 20dB gain range. ARMOR BUFFER proves to be the firmest fortress to preserve your tone. Features: Gain Control Boost Foot-switch True Bypass Specifications: Input Impedance: 2.2M Ohms Output Impedance: 10K Ohms Current Draw: 20mA Power: 9V DC adapter or 9V Battery ( neither included) Weight: 265g Dimensions: MAX 100.5(L) x 82(W) x 57(H)mm Note: Power supply not included. Please use a 9V DC power adapter whose polarity is negative center otherwise, the product may not work properly. FREE US Shipping No Duty to USA and Canada