Unfortunately I forgot the dongle with my old business laptop and have now seen that the headset incl. charging case, dongle and charging cable costs CHF 128.- and the dongle standalone CHF 72.90, can that really be? https://www.digitec.ch/de/s1/product/poly-adapter-bt600-headset-zubehoer-5688072 I have read that the direct connection via Bluetooth is not as stable and of much poorer quality, which is why you need the dongle if you talk on the phone for several hours a day. But how can it be that a dongle is worth 60% of the headset price? For 128.- you get a headset, a dongle, a charging case and the charging cable.... I find that highly questionable, almost a rip-off.