Along with the blood pressure advantages of Model 9401, the Model 9402 uses Nellcor™ Oximax™ digital processing for its pulse oximetry. The Oximax technology offers greater accuracy than conventional oximetry, even for difficult-to-monitor patients with motion or low perfusion. A lingual sensor is included. Provides systolic, diastolic, mean arterial pressure and heart rate in seconds Nellcor SpO2 all-digital Oximax technology for superior performance under low perfusion and patient motion conditions Screening mode automatically calculates averages after 5 readings for easy diagnosis Pulse rate range from 20 to 300 beats/min. Manual and automatic mode for readings Set auto measurement from 1- 90 minutes AC or rechargeable battery (4 hours)-works on 100 volt to 240 volt Stores 99 minutes of readings or last 5 hours High and low alarm setting for all parameters Message window displays system alarms and troubleshooting messages 13 cuffs in 7 different sizes included Lingual sensor with large and small clip included 3-year warranty; 1-year on battery pack