Lot of two receivers designed for use with Paul Buff Einstein E640 lights. They probably work with Digibee lights too, but I have not used those lights.

The triggers are in good used condition. They shows some wear, as pictured but work well.

From the manufacturer:

The Einstein Receiver allows remote triggering and remote power control of the Einstein E640 light. Simply attach the RP Einstein Receiver to the port on the top of the E640 light and you’re all set. The Einstein Receiver is powered directly from the E640 and is configured using the display on the E640.
  • -No batteries required
  • -Stop accurate power control of the E640 light
  • (NOT compatible with the Digibees series)
  • -Assigned to one of 4 groups/zones.
  • -Supports all 16 RadioPopper channels

A Jr2 Transmitter is required to control power levels of the attached E640 light, though it may be triggered by any RadioPopper transmitter (Jr2, PX, JrX, Nano).