About LEFTWARDS TWO-HEADED ARROW WITH DOUBLE VERTICAL STROKE
Leftwards Two-headed Arrow With Double Vertical Stroke (U+2B35) is a Unicode math symbol from the Miscellaneous Symbols and Arrows block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class ON (other neutrals), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as ⬵ or ⬵.