As you level in Endless Online Recharged stat points are automatically assigned to your character until you've reached level 10. Once you hit level 11 you will gain 2 stat points to spend in the stat of your choice then and for every level until you've reached level 40. After level 40 you'll receive a reduced amount of 1 stat point per level.
 

Power
Increases damage and the weight you can carry.
+ 4 damage for each point
+ 1 weight for each point

Accuracy
Improve your character's hitrate.
+ 4 hitrate for each point
+ 1 evade for each point

Dexterity
Increases your character's chance to evade.
+ 4 evade for each point
+ 1 hitrate for each point

Defense
Increases your character's armor rating.
+ 3 armor for each point

Vitality
Increases your character's available hit points.
+ 10 hitpoints for each point
+ 2 weight for each point

Aura
Increases your character's available magic points.
+ 10 manapoints for each point
+ 1 weight for each point