The tried-and-tested plug-in system according to ISO 4165 allows an additional connection option for supplying a variety of small consumers, such as lights, fans, coolers, telephones, laptops, portable refrigerators, coffee machines etc. Depending on the version, the plug-in systems can be installed both inside and outside the vehicle. The universal plugs allow the use of both systems with one and the same plug due to the red front adapter. Here, too, the HELLA range offers the right design for almost every application thanks to its wide variety.