With the radio communication with Bluetooth the equipment itself and the headphone which does communication.microphone,withthe portable telephone is used in the use that it speaks by telephone. As forthe former headphone being the cable, in order to connect with the equipment itself, it was necessary to be the substance in the vicinity of the body, but as for the Bluetooth headphone in order to do the sending and receiving of soundwith Bluetooth of short range radio communication standard, as for the substance it is in the place and in etc. the bag leave being, it can utilize.
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