The SP160M produces a superb warm light that will bathe your subjects in soft light. These are very high quality professional strobes that will give you years of service. They are perfect for commercial studios, location photographers as well as advanced amateurs. You can use this strobe for a main light, fill light, back light, or hair light. With the variable power setting you will have complete control over your light output. It is perfect for film or digital cameras. Similar strobes strobe sell in professional camera stores for over $149 each. SPECIFICATIONS: Power Input: AC110-130 volt, 60 Hz or AC200-240 volt, 50 Hz. Flash Power: 160ws (joule) in full. Guide No. : 120ft/36m ISO100. Color Temperature: 5600K. Flash-tube Lifetime: over 8,000 typical flashing. Power Setting: 1/16 to full continuously. Recharge Time: 0.5-3 seconds in full. Flashing Duration: 1/600 sec. @t=0.1; 1/1000 sec. @t=0.5. Slave Effectiveness: 35ft /10m. Lighting Range: 55 degree. Modeling Power: Halogen 75w. Bulb Base: E-14 screw. Synch Voltage: 5volt. Fuse: 5A. Dimension: f47-1/2 (f100mm? 195mm). Weight: 1.8Lb (800g).