Up Down Arrow ↕ emoji code is 2195 in symbols category.
Emoji Meaning: Up Down Arrow 
What does ↕ mean? Up down arrow is the official unicode name to describe the meaning of this emoji. The Up down 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.