With build-in wireless signal, this Godox Thinklite camera flash TT520II supports wireless triggering functions, which is suitable for almost all DSLR cameras with standard hotshoe.Main Features:-With 433MHZ wireless transmission, RT transmitter and 16 channels to triggering-1/300s-1/2000s flash duration, clear and vivid images-3 flash modes: M, S1 and S2 for improved versatility and usability.-8 variable flash output from 1/128 to full, meeting your flashlight demands.-Multiple auto-self protections for power saving and against overheating.-Added with sync socket, and a quick charge port for external power pack.-Integrated reflection board, giving a highlighted point on the eyes-Build-in wide panel diffuser, creating soft and natural illuminationSpecificationModel: TT520IIGuide number: 33(m ISO 100)Flash mode: M, S1, S2Vertical rotation angle: 0-90 degreesHorizontal rotation angle: 0-270 degreesPower: 4Xaa Batteries (Alkaline or Ni-MH are usable)Lighting times: 100-150 times (AA alkaline batteries used)Recycle time: approx. 0.1-5s (AA alkaline batteries used)Color temperature: 5600±200KWireless frequency: 433MHzChannel: 16Workable distance: 15mFlash duration: 1/300s-1/20000sDimensions: 190x75x55mmNet weight: 310gCompatible with:All DSLR cameras with standard hot shoe, such as Nikon, Canon, Pentax, Olympus, etc. But except for Sony and Minolta, because they use different hot shoe.