Description
2.1mm to 2.5mm CABLE ADAPTER
Some pedals use a 2.5mm d.c. input opposed to a normal BOSS style 2.1mm.

This is the The GigRig 2.1mm to 2.5mm Cable Adapter from The, listed in Guitar Pedals on guitars pedals amps and stuff.. Read More below.
Guitar pedals are compact effects units that shape and enhance a guitar’s sound, sitting between the instrument and the amplifier. They include gain pedals like overdrive and distortion, modulation effects such as chorus and tremolo, time-based effects like delay and reverb, and essential utilities including tuners, compressors and loopers. Understanding basic things such as pedal type, signal order, power requirements and intended use helps players choose pedals that suit their style, setup and playing environment.