Suhr Koko Boost Pedal Features:
 
Conveniently offers clean and midrange boosts in one dual-channel device
Up to +20dB of clean gain pushes your amp's front end for powerful presence and natural overdrive
Switchable m(fx) technology — hold the footswitch to swap between a standard transparent boost and an adjustable midrange boost
Selectable true bypass or buffered bypass
FX Link connectivity (3.5mm) supports external switchers and more
Powered by 1 x 9V battery or a suitable 9V DC center negative power supply