4000 Series Perfect companion for RV, air travel and camping! Designed to sleep with CPAP for 12 to 16 hours WITHOUT Heated Humidifier and Heated tube.
Oxygen Series Designed for CPAP or BiPap power protection using both Heated Humidifier and Heated Tube comfort features for 8 - 12 hours.
8XL Designed for CPAP or BiPap power protection using Heated Humidifier with backup run time of 8 - 12 hours.
