This is a special version of the CROS hearing aid that is designed for a person with a partial hearing loss in one ear and a total hearing loss in the other. The person wears what looks like two hearing aids. The one on the deaf side collects sounds from that side and transmits them to the hearing aid on the better side, where these sounds are combined with the sounds amplified from the better side. These combined sounds are then fed into the better ear. With a BICROS hearing aid, you can hear a person talking to you from your deaf side.