Cynaps: Hands-Free, Ears-Free, Bluetooth Bone Conduction Headset in a Hat!" This is for people who have conductive hearing loss. Similar to BAHA devices, this hat is a self contained hearing device that amplifies and directs sound to the inner ear through bone conduction (vibration). Use while Working, Biking, Gaming, Socializing, etc. Hearing/ Listening enhancement in a hat!