Good afternoon everyone!
A friend gave me Metal 2 (RBMetal2SHPn).
But without antenna
What can I replace it?

Any 2,4GHz antenna with "N" connector...

Thanks for the help.
I was embarrassed that, according to the description for Metal2, a fairly wide range is indicated (2192-2732MHz).
The antennas that I found had a much narrower range.

Standard pc, smartphone, etc. devices can work only on channels 1-14 (variable on countries) range and one narrow antenna is better