DC Battery Adapter Cable, when connected to either the DC Interface Module or the Shielded DC Cord (not included), enables Respironics' CPAP system to run from a 12-volt DC, deep cycle marine-type battery with alligator clip connections.
DC Battery Adapter cable only, Shielded DC cord and CPAP machine sold separately.
When connecting CPAP machine to a free-standing 12-volt battery, there are 2 needed cables: DC Shielded Power Cord (sold separately) and this DC Battery Adapter Cable. Battery adapter clamps directly to your freestanding battery positive and negative terminals. The other end of this cable connects to a DC Shielded Power Cord (not included), which then connects directly to the CPAP machine.