Instructions:

Height: Mid (close mid)
Backness: central
Rounded: rounded

Occurrence:
Cantonese, Dutch (Standard Netherlandic), English (American, Canadian, Hull, Received Pronunciation, New Zealand), German (Chemnitz dialect), Hiw, Icelandic, Irish (Munster), Limburgish (Hamont dialect, Maastrichtian), Mongolian, Ripuarian (Kerkrade dialect), Tajik, Toda, Uzbek, West Frisian.
(Source: https://en.wikipedia.org/wiki/Close-mid_central_rounded_vowel#Occurrence)