'the set with the earphone and microphone put together (e.g. for use in a car)'
I wonder what you call it in English.
2. earphone with a microphone?
3. any other?
I'd use 'headset'.
Thank you very much. Does the 'headset' always or usually have a microphone on it?
'headset' is almost always a set of headphone / earbuds and microphone. At least that's what people will understand it as when you mention about it.
Try doing an image search on headset in Google.