quality device with rather lousy speakerphone

The positive characteristics were already all mentioned, for this I give 5 stars. Only 3 stars there for the disappointing speakerphone quality: You can tell how the electronics modulates the volume, while occasionally also suppresses syllables. You have to close the mic or pretty loud talk to be understood by a good. My old Swisscom Top A411 has a much better / more sensitive microphone and a far better voice transmission: thus one can also speak loosely of> 50 cm relaxed and is still well understood. The latter, unfortunately, does not create the S810A. Too bad!