Planning on a road trip, or just need a replacement DC power supply for your Respironics SimplyGo? The DC power supply is a must for long road trips, or for any extended period in the car for that matter. When you have the DC supply on hand you can rest assured knowing that if the battery dies you have an alternative method of powering the unit, which also charges the battery. All flow settings are available through the usage of the DC adapter, and the set-up is simple. The adapter pulls power from the cigarette lighter in most cars, trucks, SUV's, boats, and R.V.'s, which is plugged into the SimplyGo and you instantly have an unlimited power source. Even when the DC supply is plugged into the concentrator, the battery will charge whether it is on or off. This essential accessory operates on input of 11.5 - 16 VDC with max output of 19 VDC, 7.9A Max.