Are there any health risks with this method?

Edit: mostly concerned about RF near my eyes for 8 hours a day.

No, the RF is very low power and can safely be active on your face for long periods. We've done a lot of investigation and verification with safety. While doing R&D the first 2 months we collected hundreds of hours of data on ourselves with various configurations, so we made sure it was safe before :)

Also, the RF transmission only activates when you're actively dictating.

Yeah, so a recent study discovered that talking silently makes other people harder to hear you so they think they have problem hearing.

Sensorimotor debility is a thing. This gadget surely won't help with it.