Salt chlorinator

What is the difference between and in ground pool salt chlorinator and an above ground pool salt chlorinator?

Thank you for contacting Inyo. Most of the ingorund units are designed for more than 20,000 gallons. The above ground salt chlorinators are designed for smaller pools.  Also, the inground units are dual voltage (115v/230v) and the above ground units are only 115v. Besides that, they are very similar.