GODOX 250w Professinal Smart Photography Studio Strobe Photo Soft Light Description:   Durable aluminum housing One fire anti-preflash system High power in compact size LED precise power display Equipped with buzz function Multiple auto-self protections  Specification:                          Model         250SDi300SDi               Max Power(ws)         250WS 300WS               Guide Number(ISO100)         48 58               Flash Power Variation         8 steps               8 Steps         0.5~2s               Modelling Lamp(w)         75W (adjustable)               75W (adjustable)         5600K±200K               Trigger Mode         Test button、 Sync cord、 Flash trigger、 Slave               Operating Voltage         220V\/50Hz or 100V~120V\/60Hz               Flash Duration         1\/2000-1\/800s               Triggering Voltage         5V DC               Fuse         5A(220V); 8A(100V~120V)          Packaging Included:       1 x Studio Flash Head   1 x Power Cord   1 x Instruction ManualDetail Pictures: