Patent ID: 7519399

Claim:
A handsfree device, comprising: a communication circuit for simultaneously maintaining a plurality of connections with a mobile phone handset, through a plurality of wireless channels; ring-tone sound output controlling means for making a speaker output a sound depending on a received ring-tone signal, after receiving the ring-tone signal from the mobile phone handset connected with the communication circuit; reception controlling means for receiving, by means of the communication circuit, information on the mobile phone handset transmitted from the mobile phone handset; transmission controlling means for transmitting selection information to the mobile phone handset by means of the communication circuit, according to a state of the connections through the channels and the information on the mobile phone handset received by the reception controlling means, for selecting the ring-tone signal to be transmitted from the mobile phone handset; and range information transmission controlling means for transmitting range information to the mobile phone handset by means of the communication circuit, the range information being information on a restriction to a frequency range used by the ring-tone signal to be received by the ring-tone sound output controlling means, the range information being changed depending on the state of the connections through the channels.