photographic equipment Specifications: Model D300D600D900Power Supply AC200-240volt, 50Hz or 100-130volt,60HzStrobe output 300WS600WS900WSGuide No. (ISO100) 54m78m95mCooling Fan Built-in Fan CoolerPower Setting Variable power from 1.0 to 6.0(1/32 to 1/1)Recycle Time 0.1 1s<3.5sFlash Duration 1/1500-1/800sOverfrequency Protection YesOverheating Protection YesOvervoltage Protection YesAgaist Red-Eye YesRecycle Indication Ready Light & Audio Signal & Modeling LampFlash Beam Width Over 55 DegreeSlave Sensitivity Over 33ft. Radius,360 DegreeModeling Lamp Output Diffused Halogen Quartz 250W/E27Color Temperature 5600KSynch Cord Voltage 6V DCTriggering Synch Cord & Test Button & Slave Senor & Radio TriggerFuse 10AHousing Size 136×127×320mm136×127×400mmBody Weight 2.2kg3kg3.3kg