U+05B0 Hebrew Point Sheva

The Wikipedia has the following information about this codepoint:

Shva or, in Biblical Hebrew, shĕwa (Hebrew: שְׁוָא) is a Hebrew niqqud vowel sign written as two vertical dots ( ְ‎ ) beneath a letter. It indicates either the phoneme /ə/ (shva na', mobile shva) or the complete absence of a vowel (/Ø/) (shva naḥ, resting shva).

It is transliterated as ⟨e⟩, ⟨ĕ⟩, ⟨ə⟩, ⟨'⟩ (apostrophe), or nothing. Note that use of ⟨ə⟩ for shva is questionable: transliterating Modern Hebrew shva naḥ with ⟨ə⟩ is misleading, since it is never actually pronounced [ə] – a mid central vowel (IPA [ə]) does not exist in Modern Hebrew. The vowel [ə] was pronounced as a full vowel in earlier Hebrew varieties such as Tiberian vocalization, where it was phonetically usually identical to short [a], in Palestinian vocalization appears as short [e] or [i], and in Babylonian vocalization as [a]. In early Greek and Latin transliterations of Hebrew such as the Hexapla, it appears as [ε] and [e], respectively.

A shva sign in combination with the vowel diacritics patáḥ, segól, and qamatz produces a ḥatáf: a diacritic for a tnuʿá ḥatufá (a 'reduced vowel' – lit. 'abducted vowel'). In Tiberian Hebrew, these were pronounced identical to the short vowels [a], [ɛ], and [ɔ].