The VR6524-A type is the latest model, these are the upgrades:
1. VR6524-A type lens is better than previous version, you can have a better watching feeling when you wear it on.
2. VR6524-A type package is stronger.
3. VR6524-A wearable belt is more stable and stronger.
Focus NordicKnitter Business ParkKutojantie 6-8FI-02630 Espoo