Can I use this flash meter with the K10D?

Can anyone identify or explain this flash meter a little bit? I bought it without any manual or documentation. I’m guessing you turn it on, set your iso, the max sync speed on your camera (1/180th on the K10D), fire the strobes and get the f-stop reading from the meter? And sliding the white dome controls incident versus reflective measuring mode?
I do wonder what the word MULTI means on the dial and the number listed to the left of it. Does the jack on the side of the meter mean I have to hook it up to my hot shoe?

I do wish I had the manual for this meter, if anyone can fill me in, I’d appreciate it.

Just Google'd:
http://www.kauserinternational.com/Photography/Capital/Model%20EF1.htm
(close, but not 100%)

http://photo.net/bboard/q-and-a-fetch-msg?msg_id=00CBY3

Shutter speed is (almost) completely irrelevant to flash photography - that's why there's no setting for speed It's all down to ISO and aperture.

My guess is:
* Slide over the white dome (you want incident metering)
* Set the ISO on the meter
* Set the ISO on the K10D (you want it fixed, not auto!)
* Hold the meter at the point you want to meter and fire the flash
* The meter will light up the f-stop to use.

To be honest, with digital it's often easier just to meter by trial and error - because you can see everything on the LCD! After a little practice you can normally get it right in a couple of shots.

(Check out my guide to digital flash... there's a few clues on there)
Matt