Initializing The Headset To Restore Factory Settings - Sony WF-1000XM4 Manual

Help Guide
Wireless Noise Canceling Stereo Headset
WF-1000XM4

Initializing the headset to restore factory settings

If the headset does not operate correctly even after resetting, initialize the headset.
Set the headset into the charging case.
1
Leave the lid of the charging case open after setting the headset.
Hold your fingers to the touch sensors on both the left and right units for about 10 seconds.
2
The indicator (red) of the charging case starts flashing.
Release your fingers within 5 seconds after the indicator starts flashing.
3
When the initializing is complete, the indicator (green) of the charging case flashes 4 times (
136
).