Hello,
this poe module Mini PoE Module — GL.iNet work with
GL-MT300N-V2?
Shipping time to Italy?
No. It only works with AR150 and AR750.
To power AR150 and AR750 with poe shoud connect a poe injector to wan port? The module should be insert inside the mainboard? I have this poe injector https://www.amazon.it/gp/product/B07P1RR5RM/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Is this right to power AR150 or AR750?
You need to open the case and solder the PoE module to the board. Not recommended for common user. Just buy a PoE version which already has the PoE module soldered.
The injector should be ok.