RIGHTWARDS ARROW OVER LEFTWARDS ARROW U+21C4

BlockArrows
CategoryOther Symbol
UTF-80xE2 0x87 0x84
UTF-160xFF 0xFE 0xC4 0x21
UTF-320xFF 0xFE 0x0 0x0 0xC4 0x21 0x0 0x0
HTML⇄
Pythonu"\u21C4"