You're right, it's not very strong. You have to hold it near your body if you want good results. But effects can be felt just from standing near one - I'm still not sure what causes that. Clark said it produces ozone if left running long enough, maybe that's why.
It's really a poor-man's magnetic pulser.
And yes you can connect it to the F165. You just use the red alligator clip from your F165.