All the styles above of the Unitron North 700 contain the same technological features just wrapped up in different packages to suit your level of hearing loss, lifestyle and personal preference. The 700 version is the mid-range (third from top level) providing great hearing within the North range of hearing aids. It has 16 frequency channels which is only 4 less than the flagship Unitron North Pro and Unitron North 800.
It's stand out feature is SoundNav and the Unitron North 700 model identifies and classifies an impressive 5 different environments each with their own varying degrees of background noise reduction to improve conversation clarity. If there is no conversation, SoundNav determines whether it is a noisy or quiet environment. The Automatic Binaural MyMusic feature only available in the Unitron North Pro & 800 models and is therefore missing from the Unitron North 700, 600 and 500.
Sound Conductor is in all Unitron North Hearing Aids but uses the additional information from SoundNav (Pro, 800, 700, 600, & 500) and SpeechZone (Pro & 800 only) to dynamically balance the appropriate features providing speech understanding and comfort while maintaining natural sound quality.
Also worth noting, at the time of writing, all Unitron North Hearing Aids have a 101dB dynamic range which is the best in the industry. It basically means there is less distortion so even sounds like music remain pure and clear.
In The Hearing Lab's opinion, even though the 700 is 3rd on the list, it still automatically adjusts to 5 environment classifications. That's 3 more than the Unitron North 600.