We say:

This is a beautiful ribbon microphone, capable of capturing sound from a variety of sources. It comes with a very sturdy travel case and microphone mount alongside Sontronics' lifetime warranty.

Sontronics say: 

Our original Sigma was one of the first phantom-powered ribbon microphones in the world. Offering high sensitivity, low self-noise and plug-and-play compatibility with any audio interface, preamp or mixer, Sigma and its V2 successor (released in 2018) have become must-haves in top studios and venues worldwide. 

As you’d expect from a ribbon mic, Sigma 2 delivers an intimate, natural reproduction and is beautifully suited to vocals, solo wind and string instruments as well as (if used with care) guitar amps and percussion too.