... ratedisplayed information Flow rate, volume limit, accumulated volume, power indicator light, bed No.,air, occlusion, empty.Alarm function ... Rechargeable lithium battery, 7.4V, 1650mAhEnvironment condition environment temperature 5~40 degree centigrade,pressure 86~106kPa, relative ... humidity 20%~80%Storage Environment temperature –15~50 degree centigrade, pressure 80~106kPa, ...