Regardless of the tiny dimension—in regards to the dimension of a golf ball—this white noise machine packs surprisingly huge sound. With 15 non-looping tracks, together with white, pink, and brown noise, rain, ocean waves, campfire, and extra, it blocks out resort, aircraft, and practice noise so customers can truly sleep wherever. Plus, the rechargeable battery lasts as much as 8 hours with built-in timers.
