YN560III is a brand new flash specially designed for professional creative photography. YN560III has some advanced applications. It has the fine tuning function of output power. It uses inbuilt flash or top-mounted flash as master flash. The flash can realize the high-speed continuous shooting function.You can do more nice adjustment to the flash output with this function. Compared with YN560II, it has many features as following:Specification: Model: Yongnuo YN560III Circuit Design: Insulated gate bipolar transistor (IGBT) Guide Number: 58 (ISO 100, 105mm) Flash Mode: M, Multi / Slave function: S1, S2, RX Zoom Range: 24, 28, 35, 50, 70, 80, 105mm Vertical Rotation Angle: -7~90 degrees Horizontal Rotation Angle: 0~270 degrees Power Supply: 4×AA size batteries (Alkaline or Ni-MH are usable, batteries are not included) Lighting Times: 100~1500 times (AA Alkaline cell used) Recycle Time: Approx 3s (AA Alkaline cell Used) Color Temperature: 5600k Flash Time: 1/200s~1/20000s Flash Control: 8 Levels of output control (1/128~1/1), 29 levels of fine tuning Wireless triggering distance: 100m / 328 feet (2.4G wireless); 20-25m / 65-82 feet indoor, 10-15m / 32-49 feet outdoor (Optical control) Additional Features: The electronic flash head zooming, sound indicator, automatically saving setting, PC port, power saving mode and over heat protection.Suitable for: Any cameras with the standard hot-shoe. (Such as Canon, Nikon, Olympus, Pentax etc.) For Sony Camera, the users need to buy an extra Sony hot-shoe converter.Package includes: 1× Yongnuo YN560III Speedlight 1× Protecting Bag 1× Mini Stand 1× Manual (English)