I assume you mean what type of power...the power that you gather and project into your casting. If you do not understand then you need to review your magic basics, particularly gathering and directing energy.
In my, admittedly limited, experience wands only amplify your power but are not necessary for magick. They are useful for rituals and more complex spells but their utility is really up to you. As far as I know, wands do not contain spells, they are just an instrument used in the casting of spells.
Like everything it can be enchanted and learn something i have a bracelet that absorbs power from that around it and then i focus and transfer the energy to my hand and out my wand which i use for some basic healing spells it knows by hart