@mudfish, I think that instead of the nipply tighteney thing, it has the silver hollow tube, which goes all the way through so when it’s open, it’s 100% open basically. I’m not totally sure how it shuts, I think it might be the valve cap? (which might sound daft, but, the air pressure will hold it shut)
I wonder if it’ll work with all pumps- I’ve a feeling the dual head I have on my compressor won’t, I’m pretty sure it uses the valve nipple to detect modes.
The claims about “not needing an inflator” etc are unfortunately going to be bollocks, it ought to make inflating easier but it’s not going to be easier than inflating with the valve core removed from a presta, so if a tyre didn’t inflate like that, it won’t inflate with this.