tr> Display Range Differential: ?2 mV full scale (nominal). Sweep Speed 23 mm/second (nominal). Frequency Response 1 Hz to 20 Hz (-3dB) (nominal). Sensitivity 1.16 cm/mV (nominal). Heart Rate 30 to 300 beats per minute updated each analysis period during monitoring. Monitored Lead Anterior-anterior (lead II) placement with adult defibrillation pads or ECG Assessment module (M3860A only). Patient Analysis System Patient Analysis Per protocol, evaluates patient ECG and signal quality to determine if a shock is appropriate, and evaluates connection impedance for proper defibrillation pad contact. Sensitivity/Specificity Meets AAMI DF-39 guidelines. FR2 Series Standard Battery (M3863A) Type 12 VDC 4.2 Ah lithium manganese. Disposable, recyclable, long-life, primary cells. Capacity Minimum 300 shocks or 12 hours operating time. Install-By Date Battery is labeled with an install by date at least 5 years from date of manufacture. Standby Life Defines how long the battery will power the AED in