Home Future Do you know this? : why earphone jacks have 1,2 and 3 rings
0

Do you know this? : why earphone jacks have 1,2 and 3 rings

0

Also Like :
www.techinfo99.com

some some people have noticed this and some have not every earphone jack has got rings 1 2 or 3 you ever wonder why it comes with these rings so in this …
source
do they know it,do you know this,do you know this spy trick,why rings on headphone jack