BMC G3 A20 Auto CPAP Machine is latest model CPAP from BMC which supercede the BMC GII or G2S series CPAPs. Below are the some of the improvements in the G3 series devices: No need to pull out humidification chamber to refill. Just open the top flap and you can refill easily. Due to its simplified design, its easy to clean the humidifier. Improved on screen interface with easy access to most important settings. Improved algorithms to detect and treat apnea. BMC G3 A20 Auto CPAP Machine Features: Auto-Humidity Control Pre-Heating Humidifier Option Available Auto-Ramp feature Senses patients Sleep/Wake State Central Apnea Detection Smart Auto-Adjusting Pressure Treatment based on pressures from the previous 5 nights of use Free RESmart software program to access reports on your pc. Free Mobile app available for QR code method of data access Accessory Change Reminder function RESlex exhalation relief with three comfort settings 5 heater settings on heated humidifier Real-time alert for tubing/mask leak 4-20 cm therapy pressure Super Quiet Operation with multi-stage noise reduction technology