PocketWizard Flex TT5 for Nikon  flash Transreceiver with TL Control

Full working order

Runs on AA Batteries.
Compatibility with almost anything, PocketWizards are the best of the best.

Transceivers will act as either a Trigger or Receiver depending on what you tell it to do, very handy device.

Pocket Wizard Mini TT1 Transmitter with ControlTL for Nikon