Vivitar 285HV Auto Professional Flash + " FREE " 4 AA 2700mah Batteries and Charger For The Olympus PEN E-P1, E-520, E-510, E-500, E-420, E-410, E-400, E-330, E-30, E-3, E-300, E-20, E-10, E-1, SP-550, SP-560, SP-565, SP-570, SP-310, SP-320, SP-350 Digital SLR Cameras Uses High Voltage Battery Pack / HVP-1; Uses Power Pistol Grip / PPG-1