Transmitter Kit for Godox TT520 II Universal Flash Speedlight for DSLR Cameras from Canon, Nikon, Pentax, Fujifilm, and Olympus Details Model number TT520II, Godox brand, Guide number 33 (mISO 100) Flash Modes M, S1, and S2 Angle of vertical rotation: 0-90 degrees Rotation angle horizontally: 0-270 degrees No Compatibility with the Display Brands of cameras: Olympus TTL, Canon, Nikon, Pentax, and Fujifilm No Power Source: 4x AA (Ni-MH or Alkaline can be used) (Excluded) Lighting duration (using AA alkaline batteries): 100–1500 times About 0.1–5 seconds is the recycle time (AA alkaline batteries used). 5600k±200k color temperature 433MHz wireless frequency, 16 channels, and a 15-meter working range Duration of Flash: 1/300S to 1/20000S Weight: 310g; dimensions: 190x75x55 mm