via this auction
"It is literally a Phaser/Knob-twiddler freak's dream of a pedal. It does require a bit of learning curve to get the most out of it. It has true bypass and you can split the phasing up, create sample/hold effects, and other things. There is a 4/8 pole switch on front, and it has a range knob on back as well as a controller pedal jack (which I have not tried out yet, so I'm not sure if it is a speed control or a sweep control). Everything works on this pedal all LEDs light and it is an amazing little effect. They're no longer made and they are rare... The first one I owned was a MK I. At the time of purchase I emailed Mike Both, who created the pedal and asked what the difference between MI and MII pedals were, he said MK II is a very slight improvement but overall they are virtually the same. This one I believe is a MK II, as indicated by the slighly different case and silkscreen."