We have a Forbrain hearing/brain enhancement device. Here's the description the manufacture uses:
FORBRAIN® is a revolutionary brain training headset empowering people with speech, language, and attention challenges.
Integrate FORBRAIN® into your daily routine by dedicating 10-20 minutes to speaking, singing, or reading aloud your homework or books. Use it standalone or connect a secondary microphone for sessions with a tutor, therapist, or parent.
Expands the brain's learning and sensory capacities.
New they sell for $270, plus $10 shipping and $21 tax, so about $300.
Here's a link to their website. https://shop.soundforlife.com/product/forbrain-headset-and-accessories/
Or go to: SOUNDSORY.COM
$135 and it's just like new. We have everything listed on their site.