According to one embodiment of the invention, an electronic device comprises a speaker, a microphone, and a processor that executes pairing process with another electronic device, the processor outputs pairing signal during pairing process. The electronic device further comprises a converter coupled to the speaker, the microphone, and the processor. The converter converts the pairing signal to an audio signal when the speaker outputs audio signal to another electronic device, and converts an audio signal to pairing signal when the microphone receives the audio signal. Also, the electronic device includes a wireless communication module coupled to the processor, and the wireless communication module communicates with another electronic device after pairing process.