Specifications
The SoundSleep BPAP ST20 System (LC-BPAP-20T) offers multiple modes including CPAP, APAP, BPAP S, BPAP T, and BPAP S/T. It operates within a pressure range of 4 to 20 cmH2O with a pressure accuracy of ± (0.5 hPa+4%). The ramp time is adjustable from 0 to 60 minutes in 5-minute increments, with starting ramp pressure varying by mode.

Performance Parameters
The device supports a respiratory rate of 5 to 40 BPM and a rise time between 100ms to 900ms. Inspiratory time (Ti) ranges from 0.3s to 4.0s. Sensitivity settings for inspiration and expiration are adjustable from very low to very high. It features automatic leak and altitude compensation.

Humidification and Storage
Humidification levels range from 0 to 5. Data storage is supported via an SD card and on-board memory, capable of storing over one year of data.

Physical Characteristics
The device measures 14x15.6x9.4cm without a humidifier and 26.2x15.6x9.4cm with a humidifier. It weighs 950g without the humidifier and 1500g with it.

Electrical and Environmental Requirements
It requires 100-240 VAC, 50/60 Hz, and operates at 2.0-1.0 A. The noise level is less than 30 dB at 10 cmH2O. Operating temperature ranges from 5° to 35°C, while storage temperature ranges from -20° to 60°C. The device operates in relative humidity of 10 to 93% (non-condensing) and at altitudes from 0 to 2286 meters.

Additional Features
The device includes a reusable pollen/fine filter and a 22mm, 6ft. tubing. It is controlled via a control dial and push button, and supports multiple languages including Chinese, English, and Spanish. It is classified as Class IIa, Type BF, IP22.