Sony PEG-N710C Add-on Application Application Manual page 35

Putting on the headphones
1
Holding the cap (housing) with your thumb and index
finger, rotate the hanger with your middle finger until it
opens fully.
2
Put the hanger on your ear, keeping it open.
3
Pivot the cap (housing) to best fit your ear.
Note
Put the hanger with the "R" mark on your right ear, and the hanger with the
"L" mark on your left ear.
Hanger
Cap
(housing)
35