Guide Number:10(m ISO 100) Power: 4 x AA batteries (Alkaline or Ni-MH are usable) Lighting Times: 300?1000 times (AA alkaline batteries used) Recycle Time: Approx. 0.1~2S (AA alkaline batteries used) Color Temperature: 5600K+200K Flash Duration: 1/300S?1/5000S Dimension: ?Ring Flash Head 128*103*28 mm?Control Unit 75*50*160 mm Net Weight: 370g 1*Speedlite/ 6*Adapter rings/ 1*User manual