This is the original version of the Carl Martin Octa-Switch. It is not the MKII or MK3.
I originally purchased this pedal switching system quite a few years back in an attempt to make use of my huge collection of stompboxes, which I've been in the process of selling. I turns out I'm not much of a stompbox guy, so I never even had it in me to really use this awesome switcher. Instead, I use a Boss multi-effects pedal, which is perfect for my needs. I've kept this switcher in its original box and stored safely in a closet. If you're a fan of analog and have the mind for operating such a switcher, then I'm sure you'll find this product quite useful.
Long story short, this product is in great condition. And if you're in the market for "used" stompbox gear on eBay, you might as well check out my other items for sale, because they're all in great condition and were hardly used if at all.
From Musician's Friend's product description: The concept of the Carl Martin Octa-Switch Guitar Effects Switching System is simple: take your 8 favorite effects pedals, plug them into the 8 individual loops (all true-bypass gold relays) on the Octa-Switch, and then designate what effects you want connected to each of 8 banks via the world's simplest and smallest DIP switches (located over the top of each of the 8 bank switches).Here's the original product page and reviews for this product: