i need help identifying this connector so I can order the right part anyone know what it's called

Hi I'm planning on buying a tp link m7350 and looking to fit a external antenna for when I'm on holiday where I go I have about 1-2 bars of signal on my iPhone and it's really slow how would I go...

I have a amazon Alex show 8 and I was wondering how u get the camera to notify the Alex when there is Motion