A BPL CPAP (Continuous Positive Airway Pressure) machine is a respiratory device, often part of the BPL Harmony series, used to treat sleep apnea by delivering a steady stream of pressurized air through a mask. Key features include a user-friendly interface, optional heated humidifier for comfort, and functions like ramp time and auto start/stop to improve usability. It is designed for quiet operation and may also offer auto-adjusting pressure.