A wearable wireless communication device comprising: a receiver to which an analog voice signal is input; a first amplifier configured to amplify the analog voice signal input through the receiver; an analog/digital, A/D, converter configured to convert the amplified analog voice signal output from the first amplifier into a digital voice signal; a controller configured to receive and output the digital voice signal output from the A/D converter and to output a digital voice signal received through an antenna ; a radio frequency, RF, transceiver configured to control the input of the signal received at the controller through the antenna and transmission of the signal output from the controller through the antenna; a digital/analog, D/A, converter configured to convert the digital voice signal output from the controller into an analog voice signal; a second amplifier configured to amplify the analog voice signal output from the D/A converter; and a speaker configured to transmit the analog voice signal output from the second amplifier, wherein the controller isconfigured to transmit communication group setting information to other wireless communication devices within a limited range to set a communication group with the other wireless communication devices; characterized in that the controller is configured to convert the communication group setting information into a dual tone multi-frequency, DTMF, signal and to send out the DTMF signal to other wireless communication devices through the speaker, and in that when the DTMF signal is input through the receiver, the controller is configured to obtain the communication group setting information by decoding the input DTMF signal. a receiver to which an analog voice signal is input; a first amplifier configured to amplify the analog voice signal input through the receiver; an analog/digital, A/D, converter configured to convert the amplified analog voice signal output from the first amplifier into a digital voice signal; a controller configured to receive and output the digital voice signal output from the A/D converter and to output a digital voice signal received through an antenna ; a radio frequency, RF, transceiver configured to control the input of the signal received at the controller through the antenna and transmission of the signal output from the controller through the antenna; a digital/analog, D/A, converter configured to convert the digital voice signal output from the controller into an analog voice signal; a second amplifier configured to amplify the analog voice signal output from the D/A converter; and a speaker configured to transmit the analog voice signal output from the second amplifier, wherein the controller isconfigured to transmit communication group setting information to other wireless communication devices within a limited range to set a communication group with the other wireless communication devices; characterized in that the controller is configured to convert the communication group setting information into a dual tone multi-frequency, DTMF, signal and to send out the DTMF signal to other wireless communication devices through the speaker, and in that when the DTMF signal is input through the receiver, the controller is configured to obtain the communication group setting information by decoding the input DTMF signal. <EOS>