Professional level system includes: Dynalite RP500 500 watt-second power pack, two 1050 lightweight 1000 watt second heads with modeling lights, two 32" umbrellas, two 6.5 foot light stands (not pictured) and connecting cables. The heads provide consistent 5400K lighting without color shift, the powerpack allows even or asymetric lighting adjustable in 1/3 stop increments. Flash can be triggered via the built in slave eye, with the included sync cord, or by pocket wizard (not included).