Patent ID: 6876845

Claim:
A radio communication system for a vehicle comprising: a radio communication apparatus mounted on at least one helmet to be worn by a passenger of said vehicle and including at least a speaker, a microphone and a radio wave transmitter-receiver powered by a battery housed within a case of the transmitter-receiver; and a repeating apparatus mounted on said vehicle side for communicating with said radio wave transmitter-receiver, said radio communication apparatus mounted on said helmet communicating with a second helmet through said repeating apparatus, wherein said radio wave transmitter-receiver is removably mounted at the center of a rear portion of each helmet through a removable fixing member and includes a pair of operation buttons disposed one above another on a rear face of the case, the operations buttons being disposed on either a right side or a left side of the case, and the battery being disposed in the right or the left side of the case opposite to the side where the operations buttons are disposed.