Trying to make an inexpensive wideband display, Apexi Turbo Timer and Bosch a/f

[POS carb]

Trying to make a wideband a/f display on my car.
A co-worker told me that the Apexi Turbo Timer has an a/f display so I ordered it.
I am looking at the directions online (don't have the part yet) and it looks like it accepts a wideband input but I don't think it has a controller.

1. Anyone know if it has a controller?
APEXI Turbo Timer NA Turbo Black Control Blue LED New Pen Size Free SHIP FedEx | eBay

2. if no controller, what is a cheap alternative for a controller.

Thanks!~

[POS carb]

OK this thing definitely does not have a wideband controller.
I ran across 14Point7 and they list a controller called the "SLC OEM"
it's $70, so far the cheapest controller I could find.
It looks like a piggyback board for a megasquirt or something.

I found a wiring diagram for it online

SLC OEM wiring.

Looks like all I would need is a steady 5v source, you think a usb adapter would work well as a power source for this?