●Meet that tin and the reply directly passes through the nothing thread earphone realizing ●Turn to connect and is suitable by way of the signal in all hand machines ●By way of does not have a thread earphone directly realize to meet a tin and reply ●Effectively prevent the harm to the human body of hand machine radiation ●Use the automobile power supply to realize being charged inside the car to each money hand machine and earphone ●The nothing obstacle is communicated by telephone to be smaller than 1MW apart from 10M,'s radiation power ●Time was once continuously communicated by telephone for 3 hours by the earphone , and the time waited for opportunity is 4 days ●This system is not limited to use inside Yu Che , and all can use under any ambient condition ●The fashion and classics outward appearance modelling ●MP3's audio frequency changes , and lets you appreciate the music that you like in the automobile