I don't know why headset manufactures like to create as many models as possible. From a manufacturing standpoint it might make sense. But from a consumer standpoint, it makes things confusing.
The Plantronics Savi 8200 is not one headset. It's a series of headsets that come in different variants and different connectivity/wearing options.
After reading this guide, you will know the different variants in the Savi 8200 series and what they connect to so you can make the right decision.
Multi connectivity- Savi 8200 Office
The Savi 8200 Office series will connect with your desk phone, mobile phone and computer for an all in one solution.
Single connectivity- Savi 8200 UC
The Savi 8200 UC series is single connectivity to your computer only. If you need a headset for calls or video conferencing on your computer, then the 8200 UC series is recommended.