The Olympus wireless flash system is made up of three components.

The Olympus FC-WR Wireless Radiowave Commander
The Olympus FR-WR Wireless Radiowave Flash Receiver

A compatible Olympus flash. In this case, I use the following:

The Olympus FL-900R Electronic Flash

The Olympus wireless flash system is made up of three components.

The Olympus FC-WR Wireless Radiowave Commander
The Olympus FR-WR Wireless Radiowave Flash Receiver

A compatible Olympus flash. In this case, I use the following:

The Olympus FL-900R Electronic Flash