RETRO 60 is an analogue BTE hearing aid with an average frequency range; it is suitable to compensate mild and moderate hearing loss with horizontal and gradually downward-sloping audiometric patterns.

RETRO A 1-1+ is a broadband analogue BTE hearing aid with an extended frequency range; it is suitable to compensate mild and moderate hearing loss with horizontal and gradually downward-sloping audiometric patterns with recruitment (sound perception impairment caused by sensorineural hearing loss).

RETRO A1 is an analogue BTE hearing aid with an average frequency range; it is suitable to compensate moderate and severe hearing loss with horizontal and gradually downward-sloping audiometric patterns and with recruitment (sound perception impairment caused by sensorineural hearing loss).

RETRO M3 is an analogue BTE hearing aid with an average frequency range; it is suitable to compensate mild and moderate hearing loss with gradually and sharply downward-sloping audiometric patterns.