Patent ID: 8180325

Claim:
A terminal unit capable of performing short distance wireless communication to a head set as a designated communication counterpart, wherein: the terminal unit is not locked, if the terminal unit is playing back music and is transmitting music data corresponding to the played back music to the head set in a communication state by the short distance wireless communication; the terminal unit is locked after a predetermined first time, if the short distance wireless communication is disconnected; and the terminal unit determines a use state of the head set by determining whether or not the terminal unit is playing back music, and the terminal unit is locked after a predetermined second time from a last operation signal from the head set, if the terminal unit determines that the head set is not in the use state, irrespective of the short distance wireless communication wherein: a report signal of lock advance notice is transmitted to the head set after a predetermined third time shorter than the predetermined second time, and a control signal of suppressing the lock is received from the head set including a unit that determines whether or not the head set is in a state of readiness to use, after a predetermined fourth time shorter than the predetermined second time when in the state of readiness and the lock is suppressed.