Control Human

Control Human: The wearer of this device may cast the spell charm person at any target they can see within 60'. The wearer can use this power once per round, at will. If more than one humanoid is to be affected, the wearer cannot control more than 6 hit dice or levels of humanoids at a time; however, the wearer may choose to end the effect for one or more controlled creatures at any time, in order to "free" enough hit dice or levels to control a new target.