Router or Access Point

Hi Folks,

I do live audio production, regularly with a laptop, DSP(Digital Speaker Processor) and digital mixer
connected to either an AC66 or AC68 router, with wireless control of the digital mixer with an Ipad.
No audio is going over the wireless connection, just control signals to the digital mixer, and level signals back to the Ipad.
Everything works fine and I have good range, with only rare dropouts.

I have been told that, since I'm not connected to the internet, all I need is an...

Router or Access Point