Left Right Arrow ↔ emoji code is 2194 in symbols category.
Emoji Meaning: Left Right Arrow 
What does ↔ mean? Left right arrow is the official unicode name to describe the meaning of this emoji. The Left right arrow emoji is a special symbol that can be used on smartphones, tablets, and computers. Your device needs to support this particular emoji in order for you to be able to use it, otherwise the emoji may not appear.