I do not want to tell so much over the phone. I will now clearly understood by my interlocutors, the phone does not need batteries or power supply (was also one of my reasons for purchase) and the operation is quite simple. There will be 9 different ringtones, but there are only 3 that always repeat itself. I just want to clear the criticism of some disagree here that the listener can very easily fall off and not sure rests. He is firmly great and you can calmly shake the handset or give a "pat". The stuck! I do not know what they did so that the others.