Big screen LCD,clearly monitoring the EtCO2/CO2,Respiration rate, and SpO2,Pulse(optional). Ekingst EtCO2 technology of infrared ray gase analysis: Temperature,Pressure compensation system and Zero readjustment system all these insure the accuracy and stability Balance gas compensation makes minimum influence from other gases. Lung pressure and temperature compensation(BTPS compensation) is selectable Pump flux is selectable for adult and infant KPA,mmHg or % are selectable. Audio-optical alarm for exceeding limits and apnea 24 hours trend diagram keeps still available after power-off Sidestream mode,keeping work under the heavy humid environment,also suitable for intubatton patient. The unit with main stream mode also can be mathed with CO2_COMPLEX probe and can be much esier. Data output via RS-232 port Portable and lithium battery Digital SpO2 system optional.Accuracy can be in sured even under the movement or weak perfusi