Nikon's newest professional flash is the SB-5000.
The SB-5000 is smaller than its predecessor the SB-910 and features a wireless radio control option for newer cameras such as the D5, and D500. Older cameras are not compatible with the radio feature, but optical e-ttl is still retained with this newer unit. The WR-A10 is needed to utilize this system.
The Flash head has a zoom head range of 24-200mm, and can be reduced to 14mm with the built-in diffusion tab.
The SB-500 also features a built-in cooling system that allows up to 100 consecutive full power flashes.