For connection of headsets with two 3.5 mm plugs (1 x microphone, 1 x
headphone), to smartphones or tablets with only one 3.5 mm input (4
pin, microphone and headphone combined).
* 3.5 mm headset adapter
* 1 x 3.5 mm plug (4-pin)
* 2 x 3.5 mm socket (3-pin)
