I bought the machine not knowing the previous Saturday at the children thing market. The friendly seller even said: brand new, they have never used it. And precisely in this state we will also pass on (to sell it? Only with a bad conscience!). Once tested and found to be unspeakably and unusable. The thing rushes. Done. We have adjusted the sensitivity, that did not help, the distance changes to the object, helped also nothing (as if the "object" at best, just to make a noise ...). The good reviews I can not explain it. What I use batteries supplied and intuitive operation, if the result is not good? Batteries can buy, and that complicated the baby monitor competitors are really not. Blessing in disguise: At the flea market I paid only ten euros for it and we would have only used as a second-Phönchen, second for a child's. Our "primary FR" is actually a Babycare 5 audio line and with which we are really pleased.