"PMR (short for Private Mobile Radio), also referred to as PMR 446, is a relatively new citizens' band radio application. The units must in Germany a transmit power of up to 500 mW (ERP) have what in very good conditions a range of about 5 km makes it possible. The maximum range of a PMR device greatly depends on the environment. Under optimum conditions, can be up to 10 km over bridges (z. B. between two mountain peaks). In heavily built-up areas to get often not even a kilometer. In forests that reach usually is between 2 and 3 km away. Most handsets (mainly from the lower price segment) create in built-up areas within 200 meters. " (Source: Wikipedia)
It is thus clear that an exaggerated expectation is not attached to the scope. However, there should indeed be only a child's toy. The devices are with us for a few days in operation and maximum range, we have not yet been tested, so I can submit even in position. There are other devices that have according to the description of more range, but these are also considerably more expensive.
But the fun is not too short and the children can mutually anfunken from different rooms or from the garden. The units are easy to operate and function properly. The price / performance ratio.