When you press and hold K1 Button for about 3 seconds, the green <e1>indicator</e1> of the <e2>headset</e2> flashes once every 3 seconds.
When you press and
When you press and hold K1 Button for about 3 seconds, the green indicator of the headset flashes once every 3 seconds.
<triplet> indicator <subject> headset <object> Component-Whole(e1,e2)