Cord Length: 6 Ft
The Respironics System One has two different series. The PR1 50 Series was introduced in 2010 and the PR1 60 Series was introduced in 2012. The PR1 50 Series has a white face while the PR1 60 Series has a darker gray face. The PR1 60 Series has raised lettering on the lower top of the machine as well. You can also check the model number on the bottom of the CPAP machine. Model numbers will contain either 50 or 60.
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