It's my pleasure.
It's just that particular model. I can't see which one you are wearing, because you're quite small on my screen. It's just the Plantronics 310, which has a very distinct design as well.
Particularly when you only have one side on your ear, it's not suitable for interpreters and it's not very good for listening either, because you're putting load on only one eardrum and also on the rest of your hearing. Using both sides is good.
For conference interpreters, it is very advisable to use something above the 6.8 kilohertz. What's very telling is that on their website, in the specification sheet, it is advertised for call centres to connect to a phone, that very recommended headset. To my mind, it's not good for professional use by conference interpreters or for the microphone transmission, because it cuts off the sound quality just above phone quality. Phone is around four kilohertz.