The X2DL Deluxe Booster goes between the Battery and most Lumedyne Power Packs to add 200ws of additional power to the Pack above it or add another Head jack that can be powered at 100ws or 200ws regardless of what the Pack is set at. This allows for a wide variety of asymmetrical power options. It has a switch for the Head jack power selection or to send the extra Boost power up to the Pack above it.
It is only about three inches tall weighs about two pounds and can add an f-stop to the 200ws Packs since it doubles the available power. The second Head jack syncs together with the rest of the system.