Code point
U+2406
Glyph appearance depends on your fonts.
U+2406
SoU+2406 SYMBOL FOR ACKNOWLEDGE is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Control Pictures block.
Choose the representation you need, then copy its value.
U+2406
9222
␆
␆
E2 90 86
2406
00002406
%E2%90%86
\u2406
\u2406
\u2406
\2406