The Hensel Flash Link Radio Control Module is an easy to use transceiver that is part of the Flash Link Remote Control for Tria generators that allows you to control the pack and fire it remotely from your computer. The bi-directional system connects to a Mac or PC USB interface. You can control each Tria with its own transceiver (module) or a group of them daisy-chained together. This listing is for one transceiver (control module). Remote control requires a total of 2 transceivers and Flash Link software for a compatible computer.