Wide FND Display-Photographers can easy checking power status at the strobe. Rapid sequence of shots- i4 fast action flash can freeze even water drop with fast shutter speed No power cord- i4 is built-in battery strobe. Great combination- Mount Bowen suit for all Bowen mount softbox Precision Power control- i4 strobe has two built-in Digital Encoder Systems to allow easier flash control operations. Duration time- The flash duration ranges from 1/12,800 second In Action mode LED- 5W LED modeling light,LED can continuously be used for 56 hours. Compact design- I4 Compact strobe makes it portable to carry around. Capacitor- Electrolytic aluminum capacitor used in strobe is small.