If you are in John Frusciante's RHCP tunes, this is it.If you are not, still consider this one, it's great and has a led ! The WH10 series has remained a highly popular wah pedal through the years due to its many unique features. The guitar/bass range switch enables switching between two preset frequency ranges best suited for each instrument. This is also the first wah pedal to utilize a multiple feedback opamp circuit, creating a much different tonal quality versus more common inductor based wahs. There is also a volume boost for additional flexibility. The WH10V3 features selectable true or buffered bypass and circuitry is housed in a highly-durable, die-cast Aluminum alloy body with a distinctive black finish.