Earphone jacks: Ever wondered why some of them have three rings and others have two? (Video)

While music helps you de-stress, different genres of it make you groove to the set beat, and earphones play a major role in the audio quality. But, did you notice that some earphones have three rings while the others have two rings on the audio jack? This video clears all your doubts and let's you buy the right earphone for the right purpose.