Pedro-

That's a great Christmas gift... I t is amazing what is packed in that little box..

Since so many hams in the USA read this blog, and if you were in the USA, I would recommend R & L Electronics in HAMilton, OHIO.
They not only offer the "genuine article", but at least 2 flavors, the 3 inch and the 4 inch screen. Plus a warranty, and depending on what you spend, free shipping.
Their web site is: http://randl.com

In case there is a US ham interested in leaving hints about the house got Santa..

I believe the 4 inch screen -H4 model sweeps more than 101 points.

When using the computer you can set the sweep to at least x5 or more.. it takes longer for the nanoVNA to draw a graph on the computer but you have 500 or more points. This is especially grand when tuning filters, notches and duplexers.

Enjoy The Christmas holidays, one and all.

Larry W8LM
Mulvane, KANSAS USA.