From Phonak's literature:
Phonak Naída B, the 5th generation of the world’s most trusted power hearing aid, has been developed for the broad diversity of severe to profound hearing losses. Powered by the innovative technology of the Phonak Belong™ platform, Naída B offers a UP and a SP model in four performance levels and the most feature-rich, rechargeable hearing aid from Phonak: Naída B-R RIC.
Naída B provides fitting flexibility with Adaptive Phonak Digital Contrast, a new slow compression option which increases the envelope cues for speech. It also utilizes dedicated features such as Binaural VoiceStream Technology™ for improved speech understanding and SoundRecover2 for more audibility of high frequency sounds. With the enhanced Roger and directional, listening effort in the near field is significantly reduced.
We are excited to introduce the 5th generation of the world’s most trusted power hearing aid: Phonak Naída™ B. - Source: Phonak
The Phonak Naída B-UP B90 has water resistant coating, telecoil, push button, ip rating (liquid), ip rating (solid), disposable batteries, volume control, directionality, spatial noise cancellation, adaptive adjustments, clarity volume control, phone in stereo, frequency lowering, preference adaptation, ear simulation, adjustment bands, feedback suppression, noise reduction, wind noise reduction, echo reduction, sudden loud noise reduction, adjustment synchronization, occlusion reduction, tinnitus relief, automatic acclimatization, automatic phone program, environmental adaptation, listening programs, and audio stream mixer. Fewer features are available in lower technology levels: Phonak Naída B-UP B70, Phonak Naída B-UP B50, and Phonak Naída B-UP B30