The 3700 Series ECCO Surface and Grommet Mount LED Light Heads offered by CPW have so many features, it would take an hour to list them all. They, of course, have the standard 5 year warranty, Die -Cast Aluminum housing with Epoxy Encalsulated Electronics, polycarbonate lens and some models offer nylon housing and/or urethane encapsulated electronics. Most of the 3600 Series offer up to 13 flash patterns including, Steady Burn, Double, Fast Double, Quad and Quint(5) and four internalalternating modes. These models are SAE J845 Class I and California Title 13 approved.