Here is a link to a blog on our website about Green Noise, https://yogasleep.com/blogs/give-sleep-a-chance-blog/the-power-of-green-noise-how-nature-s-sounds-can-boost-your-well-being?_pos=3&_sid=c105fe723&_ss=r.
We currently do not have a machine with Green Noise specifically as an option, it is mainly only available on apps. This is why we suggest getting a unit and trying it out for 30 days. We would recommend getting a unit that offers multiple "Color" sound options to best suit your needs. The following units below have sounds that are very similar if not mimic the "Green Noise". Also, our fan-based units (Dohms) are within the noise frequency that "Green Noise" offers. By turning the top/sides to open close vents you can reach the frequencies for green, brown, and pink noise.
Dreamcenter: https://yogasleep.com/collections/multi-sound-machines/products/dreamcenter# (https://yogasleep.com/collections/multi-sound-machines/products/dreamcenter)
Sound Options: (26 total) Including 9 White Noise options like Fan Sounds, Dohm sounds, and Brown Noise. 10 sleep songs (Twinkle-Twinkle Little Star, Lullaby, Happy Child, Landscape, Calm, Chimes, Relax and Restore), and 7 nature sounds (Rain, Ocean Surf, Gentle Surf, Stream, Thunderstorm, Birds, and Campfire).
Features Offered: Optional timer function (45m, 90m, 8H), optional color-changing night light, & headphone jack for personal listening experience.
Duet: https://yogasleep.com/collections/multi-sound-machines/products/duet
Sound Options: (30 total) Including 2 Dohm signature sounds, Fan sounds, White Noise, Brown Noise, Pink Noise, 9 Nature Sounds, Relaxation tracks, and Calming classically-inspired Lullabies.
Features Offered: Optional wireless speaker option for customers to stream their own music, etc. Optional timers (45m, 90m, 8H) and optional dimmable night light.