| 摘要 |
When connections among a cellular telephone, a car stereo body part and an operation part are made by wireless and the operation part is attached to the car stereo body part, a call using the cellular telephone is enabled at the side of the car stereo body part and when the operation part is detached from the car stereo body part, a call using the cellular telephone is enabled at the side of the operation part. As a result of this, a driver enables a handsfree call by placing a microphone for driver near to the driver of a sun visor etc. and when a fellow passenger wants to call instead of the driver, a call is enabled in the operation part 11 by detaching the operation part from the car stereo body part.
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