Features BALANCE control BALANCE controls the mix ratio of the two peak levels produced by the resonance of the dual inductor circuit. The higher frequencies provide an adjustable range similar to most traditional wah pedals. The lower frequencies are closer to the frequencies commonly found in modified or typical wah-wah pedals. Turning the BALANCE control counterclockwise emphasizes the higher frequency peaks, while turning it clockwise emphasises the lower frequency peaks. TONE mode switch The TONE mode switch selects the frequency range of the wah tuning: HIGH or LOW. HIGH: The high frequency resonance ranges from 670Hz to 3kHz, which is a higher range than a typical wah-wah pedal. Therefore, there’s a chance the tone could be too bright, so it’s recommended to adjust the balance and level controls on the pedal, or the tone control on your guitar to soften some of the higher frequencies. The low frequency resonance ranges from 300Hz to 1kHz, which is a slightly lower range than a traditional wah-wah pedal. LOW: The higher frequency resonance ranges from 440Hz to 2kHz. This range covers the range typically used by traditional wah-wah pedals. The low frequency resonance ranges from 220Hz to 750Hz. MASTER LEVEL CONTROL MASTER LEVEL controls the overall level of the output signal. At 12 o'clock you have unity gain and up to +6 dB gain. Specifications Control: Master level, Balance Switches: Tone mode (High/Low) True Bypass I/O's: Input, Output Weight: 815g Size: 96(W) x 202(D) x 84(H) (mm) Required current: 15mA@9V Power supply: One 9 volt battery or external DC 9 volt AC adapter