Vong Filterung, all in good working order.
This is a really useful piece of kit, a variable HPF and LPF, a polarity change and a DI.
This pedal has had a repair, about three years ago the mains socket worked loose, it was replaced (by a professional) and it has been fine since. When the work was done I asked if the tec would put some calibration marks on the casing which he did in pencil - the casing is a bit grubby as I've been reluctant to clean it. With velcro underneath.
+ £5 postage