The Strymon Flint Tremolo & Reverb Pedal is used by musician John Mayer.

John Mayer uses the Boss GE-7 Equalizer Pedal in one of his guitar pedalboards.

The Real McCoy Custom RMC8 Guitar Eqwahlyzer Wah Pedal is found in one of guitarist John Mayer's pedalboards.

Guitarist John Mayer's pedalboard includes the Roger Linn Design AdrenaLin III Guitar Effects Processor.

In this photo of John Mayer's pedalboard, his T-Rex Engineering Replica Pedal can be seen on the top row of his Pedaltrain pedalboard, next to the Aqua-Puss.

The Eventide TimeFactor Twin Delay Guitar Effects Pedal is spotted in one of John Mayer's many pedalboards.

John Mayer, the reprised American guitarist, uses the Keeley Katana Pre Amp Guitar Effect Pedal in his guitar pedalboard, to achieve a very clean sound cut.

In this photo of John Mayer's pedalboard, his Boss BD-2 Blues Driver pedal can be seen in the bottom row of the board. If you look closely, you can see the "Keeley Electronics" sticker on the back of the pedal, meaning his BD-2 was the Keeley-modded version.

The Ibanez TS808 Vintage Tube Screamer Reissue is an important component of guitarist John Mayer's pedalboard.