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 illumination 
Technical Date: Model: TT520II Guide number: 33(m ISO 100) Flash mode: M, S1, S2 Vertical rotation angle: 0-90 degrees Horizontal rotation angle: 0-270 degrees Power: 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±200K Wireless frequency: 433MHz Channel: 16 Workable distance: 15m Flash duration: 1/300s-1/20000s Dimensions: 190x75x55mm Net weight: 310g 
Compatible 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. 

A versatile speedlight, the V850II Li-Ion Flash from Godox fits any camera with a shoe mount and features a built-in 2.4 GHz X wireless transmission system for master and slave functionality with a range of up to 328′. The flash also offers notable power and speed, with recycling times of 1.5 seconds or less and a rated guide number of 197′ at ISO 100 and 200mm.

The Godox V850II features an adjustable zoom range of 20 to 200mm that accommodates many different lenses. Tilting vertically from -7 to 90° and rotating a full 360°, this flash enables you to bounce light with ease even if it is mounted on top of the camera. The lithium-ion battery it uses is rechargeable and allows for 600 full-power flashes when fully replenished. Support for high-speed sync triggering as fast as 1/8000 seconds is available with optional triggers. The flash comes with the rechargeable battery as well as a charger, small stand and protective case.

A versatile speedlight, the V850II Li-Ion Flash from Godox fits any camera with a shoe mount and features a built-in 2.4 GHz X wireless transmission system for master and slave functionality with a range of up to 328′. The flash also offers notable power and speed, with recycling times of 1.5 seconds or less and a rated guide number of 197′ at ISO 100 and 200mm.

The Godox V850II features an adjustable zoom range of 20 to 200mm that accommodates many different lenses. Tilting vertically from -7 to 90° and rotating a full 360°, this flash enables you to bounce light with ease even if it is mounted on top of the camera. The lithium-ion battery it uses is rechargeable and allows for 600 full-power flashes when fully replenished. Support for high-speed sync triggering as fast as 1/8000 seconds is available with optional triggers. The flash comes with the rechargeable battery as well as a charger, small stand and protective case.