Buttons on the front panel make it easy for staff to set patient parameters, thus effectively reducing the time required for setting. The built-in control mechanism helps doctors to contact the reinforcement duration of a single delay to ensure that patients who may have severe apnea after falling asleep get the best treatment effect. Working pressure range: 4-20 cm water column pressure adjustment 0.2 cm water column increment delay timer can set the delay boost time to 5, 10 or 20 minutes (height x width x depth). 4.15 "x 9.5" x11/05mm x240mx280mm Weight 3.9lb/1.77 kg Power input range:1/kloc-0. Tips: If you don't use a humidifier or a ventilator, please be sure to drain the water in the water tank and separate the humidifier from the ventilator, so as to avoid water from the machine and affect your normal use.