The Hensel 3393 is a F-Spot Fresnel with a round plug. This is a classic Fresnel light - it produces a bright light with very sharp shadows when fired from your Hensel EH Pro series power pack. The beam spread can be adjusted from 13 - 64deg.. It is fan-cooled and has a 650W modeling light. This flash head has a 16' (5 m) head cable that terminates with a 20 pin plug that fits the Tria series power packs. Use the included 4 leaf barndoor set to adjust the shape of the light emitted.