We bought the Reer 5006 Scopi especially for our vacations in Club facilities so that we can sometimes leave the room in the evening, while our child is sleeping. Right after the equipment was delivered, we can test it and loved it! In built-up urban area, it has a range of about 2 km, which is more than adequate, since no one away infinitely far from his child. We tried it both with and without a microphone and the parent-child channels actually work properly. Even very quiet sounds were transmitted properly. The device description is simple, illustrated and easy to understand. Overall, we can Reer 5006 Scopi recommend, especially since it can be later used as Walki Talki.