As character names:

U+21C4 RIGHTWARDS ARROW OVER LEFTWARDS ARROW character (⇄)

As raw characters:

⇄

As a string of HTML entities:

⇄

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 135, hex 0x87, octal \207, binary 10000111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 132, hex 0x84, octal \204, binary 10000100
This is continuation byte 2, expecting 0 more.

U+21C4	RIGHTWARDS ARROW OVER LEFTWARDS ARROW