1ATM(approximately 100000Pa)~0.1Pa,750000~0.75Micron，0.1Pa~1000Pa;Reading±5%(at20℃)，0.1Pa(<10Pa);1Pa(<100Pa);10Pa(<1000Pa)，Pa,mBar,mmHg,mTorr,InHg,Microns40 hours(4×AA battery)   ，0.5MPa/72PSI ，-5~50℃(-23~122℉) ，90db,shut down after 10 seconds