Source: Complete Arcane
You can channel the magical energy of a wand through your melee attacks.
Prerequisite: Use Magic Device 4 ranks.
Benefit: As a standard action, you can make a melee touch attack with a wand, expending one charge to deal 1d6 points of damage to the creature struck. You apply no extra damage to this attack regardless of its source (including sneak attack, favored enemy, and smite bonuses), but you can activate the wand as part of the attack. If the spell cast from the wand is a ray or a targeted spell, the creature struck is the spell's target (with ray spells hitting automatically). If the spell affects an area or creates a spread, you can designate the spell's point of origin at any grid intersection point of the creature's space (but doing so might put you in the affected area). Spells with an effect that does not cover an area (such as the various summon monster spells) cannot be used with a wandstrike attack.