additional head set的用法和样例：
- There's a head set plug in the armrest for you to enjoy music.
- Right by thumb you can see the place where you plug in the head set.
- Add Bluetooth icon to dial screen while head set profile is connected.
- Every additional heading also becomes a section in this manner.
- Accurate design makes your voice much more limpid.High-quality head set gasket and ear cotton deliver you maximum comfort during long listening.