| withVoice-echo comprises the earphone, microphone and control module. You can listen to your sweet voice enhanced with echo sound(adjustable) using the attached microphone of withVoice-echo simultaneously as listening to the original sound from a sound device including cell phones, laptops, PMPs, MP3s and DMB receivers connected to it(using the ack). withVoice-echo is the singing room echo earphone of new concept giving the same effect as you sing a song in a singing room in any place at any time.Furthermore, withVoice-echo demonstrates the remarkable effects in correcting pronunciation, memorizing the lyrics and practicing the pronunciation because those who want to alter the voices can compare their voices as listening to their voices simultaneously with the original sounds from the sound devices.withVoice-echo is also used as the earphone for language study because foreign songs are very helpful for learning foreign languages. | 
