This AC device charges the special ORLIT Battery Power Pack Unit for the Rovelight RT400 Monolight. The rechargeable battery module is a massive interchangeable high energy 14.8 volt Lithium Ion 4400mAh battery, capable of over 400 full power flash bursts on a single charge. Recharging is accomplished directly to the DC port on the battery so you can stay in the shoot with a fresh module while the exhausted power pack is charging. The charge operates worldwide.