Commlite has 2 version of the adapters. CM-ENF-E1 http://www.commlite.com/product/2.html and CM-ENF-E1 PRO http://www.commlite.com/product/8.html. The difference are physical and build quality. CM-ENF-E1 came out first but you can update the firmware V06 while CM-ENF-E1 PRO now shipped with V06 default.
If you want to buy the PRO, can consider getting from ebay.
