Provides both a mana bar and audible alert.
The mana bar triggers @ x% which is set to show @ 60% or less. This can be changed in "trigger" -> "power %"
The audio alert is set to 15% and requires http://hallhome.us/images/wow/Need_mana.mp3 placed in the "World of Warcraft\_retail_\Interface\AddOns\SharedMedia\" folder. This can be changed in the actions tab.