The mobile phone has developed rapidly, enriches people's life, makes life more convenient, and communication seems easier. Does the popularity of mobile phones bring us any disadvantages? I think a lot of people like one of my friends by mobile phone ring tones of mischief, and he said to me, he always hear the neighbors in the rest of the time of the day the use of mobile phones play music loudly, playing a game of voice, loudly call voice, let he couldn't sleep, let him upset. I saw him so upset that I suggested that he use a multifunctional adjustable professional cell phone blocker
to stop the phone from working and avoid the sound.