MXR

One of the big 3 pedal makers in the world. It was was co-founded in 1972 by Keith Barr and Terry Sherwood. The brand was acquired by Dunlop Manufacturing in 1987. MXR pedals are known for their rugged, reliable design and their simple, straightforward controls, and they are a popular choice among many musicians. Some of the most famous MXR pedals include the Phase 90 phaser pedal, the Carbon Copy delay pedal, and the Dyna Comp compressor pedal.

https://www.jimdunlop.com/mxr/