The newest version of the NormaTec Elite focuses on compression, & it delivers in all areas improving on its predecessors significantly. Probably the most conspicuous step forward is that the last hoses and the control unit have been removed. The boots now each have a small control unit that can communicate with the other, adjust the compression level, time, zone boost, etc., all without using an app. Each boot also has its own battery, so the total operating time is about 4 hours which is an hour more than the older NormaTec 3. Such upgrades have made the NormaTec Elite more appealing and practical in application, which makes them fit in best for professional use or at sport events.