The Puritan Bennett GoodKnight 420E CPAP includes the following features:

• Smallest, lightest CPAP on the market.

• SilverLining Data Management software option to download compliance and session data.

• International power supply to operate on any AC current from 110 to 240 without adjustment to the machine. (An adapter may be needed to plug the CPAP into a wall outlet outside the US.)

• Automatic altitude adjustment.

• Direct DC operation without the need for a DC/AC inverter, just a cable and adapter which are sold separately.

• Automatic leak compensation.

• Two washable, reusable pollen filters are included; optional ultra-fine filters are available.

• Two year manufacturer warranty against defects.