Code point
U+290C
Glyph appearance depends on your fonts.
U+290C
SmU+290C LEFTWARDS DOUBLE DASH ARROW is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Supplemental Arrows-B block.
Choose the representation you need, then copy its value.
U+290C
10508
⤌
⤌
⤌
E2 A4 8C
290C
0000290C
%E2%A4%8C
\u290C
\u290C
\u290C
\290C