Paladin
Explorer
Wands are activated by the spell trigger method, from the SRD:
"Wands use the spell trigger activation method, so casting a spell from a wand is usually a standard action that doesn’t provoke attacks of opportunity. (If the spell being cast, however, has a longer casting time than 1 action, it takes that long to cast the spell from a wand.) To activate a wand, a character must hold it in hand (or whatever passes for a hand, for nonhumanoid creatures) and point it in the general direction of the target or area."
So, to me it sounds like you should be able to point the wands (in the bracer) at a target and blast them. I would say that you could still only use one bracer full of wands in a round, unless you're hasted.
"Wands use the spell trigger activation method, so casting a spell from a wand is usually a standard action that doesn’t provoke attacks of opportunity. (If the spell being cast, however, has a longer casting time than 1 action, it takes that long to cast the spell from a wand.) To activate a wand, a character must hold it in hand (or whatever passes for a hand, for nonhumanoid creatures) and point it in the general direction of the target or area."
So, to me it sounds like you should be able to point the wands (in the bracer) at a target and blast them. I would say that you could still only use one bracer full of wands in a round, unless you're hasted.