Needed a Walki Talki for my son to communicate over 2 floors falling asleep etc. And if it goes away without the parents (we live in a rural area). Time receive goods, unpacked ... batteries in., Tried ..... ......... and works as described by others. No noise, understand my child, even at greater distances. Which is 5 km are very useful. Power saving function ..... setting weak or strong broadcast ...... Noise Reduction ........ etc .......... class. Not to mention how small the device and our little one with his 6 years, his joy therefore, could deal with it immediately and sleeps now calmed a with the knowledge to reach us and the built-in blue (bags) lamp.