The Smith-Victor FlashLite 45i is a 45 watt-second AC powered flash that can be used as a master unit, or as a slave flash within a multiple set-up. The FlashLite 45i fits in to any medium screw base socket (sold separately), and is ideal for basic flash configurations. Use as a remote flash to add overall light to a scene, target specific areas where light is needed or use as an accent light for larger sets.