Specifications: 1.Circuit Design: Insulated Gate Bipolar Transistor (IGBT) 2.Guide number: 58 meters (ISO 100,105mm) 3.Flash mode: TTL,M,RPT,S1,S2,Remote 4.Vertical rotation angle: 0-90 degrees 5.Horizontal rotation angle: 0-270 degrees 6.Power supply: 4XAA size batteries (Alkaline or Ni-MH are usable) 7.Lighting times: 100-1500 times (AA alkaline cell used) 8.Recycle time: approx.4s 9.Color temperature: 5600k 10.Flash time: 1/200S-1/20000S 11.Flash control: 8 levels of output control (1/128-1/1) 12.External interface: Hot shoe,PC port and eternal charging port (Use MK-SD8A) 13.Wireless triggering distance: 20-30m indoor,10-15m outdoor 14.Additional features: FEC,AEB,Manual zoom,Auto zoom,PC port. 15.Dimensions:200X75X57mm Package Include: MK-950 Mark II TTL Slave Wireless Flash Speedl.