To be honest, aside from minor sleep ... different sound options (five of which are nature sounds), this is the model I reach for. It’s reliable, budget-friendly, and it can even go cordless ...

White noise has been my go-to sleep sound for years ... Music Tuned to 440 Hz Versus 432 Hz and the Health Effects: A Double-blind Cross-over Pilot Study. Explore (NY). doi: 10.1016/j.explore.