White noise machine

MJJS

Hi mamas!! I need to know, what is the BEST white noise machine out there? I’ve seen so many, and I can’t decide. My son is 14 months and after sleeping with the air conditioning during the summer, he’s kind of restless without the background noise now. Looking for something that can go continuously throughout the night if possible. I would rather it not play music or beach sounds, more like a humming noise I guess? Thank you!!