This bundle includes the RG1000 Safety Plus (w/ compressor) as well as our EC5 12V Cigarette lighter adaptor port with low voltage cutoff. The adaptor allows you the additional convenience of a 12V cigarette lighter adapter to power devices such as GPS, air compressors, etc.. The adaptor features a low voltage cutoff which will protect the battery in the RG1000 from draining too low prolonging battery life.