The PowerLight PL2 series incorporates the most advanced electronic components providing you with superior lighting control, repeatability and optional wireless function controls. The four models are constructed to fulfill the demanding operational need of the professional photographer. The DR models offer digital displays for flash power or modeling power and precision adjustments in 1/10 or 1/2 f-stop increments. All four models incorporate proportional or manual options for the 250-watt quartz modeling lamps. Click here to download the PowerLight manual.