Is Sanrenmu 701 all stainless steel?

Just received my Sanrenmu 701 from Fasttech. It says package came from Switzerland?

Looks great for such a cheap knife. I ordered it to keep on my boat where it will be exposed to rain and weather. Is it all stainless steel or will parts of it rust on me?

It was probably delivered by Swiss Post, an option when shipping knives. If you mean the SanRenMu 7010 or 7001 then the answer is the same, they are stain-less steel like all stainless steels, some are more likely to corrode that others.
Short of Spyderco Salt series with H1 steel any stainless will rust over time.
If you look after it and dry and lubricate it after use then all should be well.
There is a product that I use, Sentry Solutions Tuff-Glide, they have a Marine Tuf-Cloth that would suit your purposes.
It’s an oil free lubricant and protectant

Yes, I mean the 7010. Thanks for correcting me.

For $8 USD I’m not expecting much so was just more curious about what to expect. I may wipe it down occasionally but not likely to be very diligent in caring for an $8 knife. I bought a cheap[ie like this just so I wouldn’t have to.

I don’t exactly use mine in a marine environment but I do live near the sea, other than a sweaty hand now and again, give it a go, like you said an $8 knife.
This one with the black coated blade and handle might last the longest but any will perform well.