Add a microphone and in-line controls to your favourite headphones or earphones. Plug your earphones or headphones into the 3.5mm stereo socket at one end and the 3.5mm TRRS plug at the other end into your smartphone, tablet or computer. The in-line microphone allows you to make calls, and the switch buttons answer or hang-up calls. You can play or pause your current music track and adjust the volume up and down.
