It is always difficult to be positive when talking about communication distance for this type of walkie-talkie, which is considered as a "toy" and therefore not intended for professional use.
The configuration of the house can directly influence the quality of the transmission-reception, such as a large presence of concrete walls and slabs.
But overall, this device has given and gives complete satisfaction under normal conditions of use. The fact that the pack contains 3 devices is a big advantage with children, and they are certainly less sensitive than adults to sound quality. They are still surprised and fascinated to be able to talk to others from a distance.

Hello,
The indicated range is 4 km (without obstacles or interference). These TWs therefore work very well throughout the house (subject to the presence of other devices nearby transmitting at the same frequencies). Tested from inside the house up to approx. 1km without any problems.
Greetings.