I have it for two years, it's a very good dog, easy menu, good open listening. The only small disadvantage it has is that all sites mention that it works with power interruption. Unfortunately, I also have the 6821, which is an automatic answering machine, and the 6811, neither of which works. It's misinformation and they write it on almost all sites and in all features, it's wrong. Don't expect it to work during a power outage. The ringing sound is satisfactory because it has sound in the base and in the headset, so it covers both, unlike the 6811 which only has the headset. There is an issue there, it is not loud enough on its own. The open listening sound is very good and does not distort, it is clear and loud, it covers me. I would buy it again. When I bought it, it was around 32 euros. Now it's a bit more expensive, sometimes it drops a little below 30. The range inside the house and in all rooms and balconies is perfect. When you change floors, go up to the terrace or go down to the ground floor of an apartment building, there is an issue. Those measures they mention, 300 meters and more, do not apply. I don't know what happens in a straight line or in a detached house, but in an apartment building where I have tried it, when you change even one floor, there is an issue. It barely catches and only in specific points inside the house. However, on the same level and on balconies, it catches perfectly