Instructions:

Point of articulation: front upper teeth

Articulator: lower lip

Manner of Articulation: Approximant: An articulator approaches a point of articulation, but the constriction degree is not so narrow as for fricatives or stops.

Voice: voiced – Vocal folds are close and vibrating.

Occurrence:
Armenian (Eastern), Assyrian Neo-Aramaic, Danish (Standard), Dutch (Netherlandic), English, Finnish, German (Standard, Swiss), Guarani, Hawaiian, Hindi, Marathi, Norwegian (Standard Eastern), Nsenga, Portuguese (some speakers), Miyako, Punjabi, Serbo-Croatian, Slovene, Swedish, Tamil, Turkish, West Frisian.
(Source: https://en.wikipedia.org/wiki/Labiodental_approximant#Occurrence)