Questions about Antlion ModMic V4, incl. mute button

According to current information in about 3-4 weeks, i.e. end of March 2017. By the way, here is the article: AntLion ModMic V5 (Mono)

Unfortunately, we can't say exactly at the moment. As soon as it is in the range, we will of course add it to the shop immediately.

This is the unidirectional version. However, one cannot speak of active noise cancelling in this context. The cardioid characteristic of the mic simply ensures that sound hitting the mic from the side and from behind is picked up much more quietly, which emphasises the speech (or the sound from the front). More detailed information on the manufacturer's website: http://www.modmic.com/pages/microphone-patterns

The microphone adheres magnetically to the small holder, which is fixed to the headphones. This means that the microphone should be easy to install and remove on a daily basis.

Very likely, yes.

Simply put: http://praxistipps.chip.de/mikrofon-niere-oder-kugel-die-unterschiede_19335 ;)

Version 4 has a unidirectional microphone.