For Nikon, You need this Nikon Trigger to communicate between the camera and the flash unit to trigger the lights.  For Off Camera Flash you will need this type of trigger to create beautiful light.

1.Remote control speedlite (Nikon)
Support flash mode: i-TTL(II),Manual,RPT flash.
Shutter sync:1s/2nd curtain sync,Max Hi-speed sync(1/8000S).
Remote control :Remote control flash menu via camera.
Mix control:Support i-TTL,Manual,RPT flash mixed using
Support the flash zooming (auto/M).
Support flash set on transmitter,and work with TTL function.
Support exposure compensation (FFC)
Support exposure bracketing (FEB)
Support exposure lock (FEL)
Support the depth of focus previews modeling bulb to flash.
Support Manual/FP/Group(ALL/A:B/A:B:C).
Support normal flash under the situation of LCD live view.
Support hi-speed continuous shooting flash.
Support camera and flash with single contact to trigger.
(Max flash sync speed is 1/250s)

2.Trigger Studio Flash&Outdoor Flash
Support 1/8000s HHS with Nikon camera

3.Remote Shutter Release
Remote control camera shutter
Wake-up and focus camera

4. LCD Display,easy to operate
5 Channels,4 Groups(16modes)
Exposure compensation (FFC) displayed in LCD
Built-in Lion battery power supply,with external charger
With external studio flash jack and shutter release port.

Specification
Hi-speed sync 1/8000s,for Nikon series.
Transmitting frequency:FSK2.4GHz
5 Channel ,4 Groups (A/B/C/D,16modes)
Distance:100m+

Package inc.
e port. 1.Transmitter =1pc
2.Receiver=1[c
3.Studio flash sync cable φ3.5=1pc
4.Studio flash sync cable φ6.35=1pc
5.User manual=1pc