Oh nobody answered you...
Emerald sabers allow you to change colors by plugging them to your computer. So, it's set on a specific color you chose, but it can be changed later on. It's said here (
http://www.saberforum.com/index.php?topic=46398.0) that Emerald prizes include sound. Not sure if V3 or V4. Not sure about FOC.
Charging port is probably an option you'll have to pay for.
Best thing is to contact US if they haven't contacted you already to enquire about which hilt you want.