This is the Carl Martin Octa-Switch II, a professional-grade effects loop switcher that lets you control up to 8 pedals across 8 programmable presets ("banks"). Each loop uses true-bypass gold relays for silent, tone-transparent switching. Presets are set with simple DIP switches above each footswitch — no menus, no software, just flip a switch and you're done.

Key features:

• 8 true-bypass effect loops, each independently assignable to any of 8 banks
• Dedicated bypass footswitch to kill all effects at once
• Two external switching jacks for amp channel switching or dual-amp setups
• Mono input, mono/stereo output, switchable buffered or true bypass
• All-metal, road-worthy chassis
• Powered by dual 9V batteries or a regulated power supply (Carl Martin Power Jack, sold separately)