Indicators Specifications Power Red Indicator Insp.phase +/-0.1kPa Green Indicator Chargering Red Indicator Exh.phase Green Indicator Low Battery Red Indicator Controls Breath Rate 10 15 20 25 30 35bpm I:E 2:1 1:1 1:1.5 1:2 1:2.5 1:3 Tidal Volume 300 ~ 1000 ml