Sony ULT WEAR Quick Start Manual page 86

The touch sensor control panel is not touched.
Depending on the ambient conditions and the type/volume of audio playback, ambient sounds may not be heard even when using
the Quick Attention Mode. Do not use the headset in places where it would be dangerous if you are unable to hear ambient
sounds, such as on a road with car and bicycle traffic.
If the headset is not being worn properly, the Quick Attention Mode may not work correctly. Wear the headset properly.
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