7.5" TFT Touch screen 12 leads simultaneous display 80 mm Thermal printing system Power supply both AC and DC High capacity built-in lithium rechargeable battery battery power supports continually record 150 pieces of ECG Built-in database Store more than 1000 pieces of archive Digital signal processor for filter Auto-measurement, auto-analysis, auto interpretation functions. Sensitivity choice: 2.5, 5, 10, 20, 40mm/m V.Standard Sensitivity is 10mm/mV0.2mm/mV Measurement parameters: HR, P-R interval, P-Duration, QRS Duration, T Duration, Q-T interval, Q-Tc,P Axis, QRS Axis, T Axis,R(V5), S(V1), R(V5)+S(V1) Product safety type: Class 1, Type CF, there is delifibrillation and pacing protection circuit. Enduring polarization voltage:300mV Noise level: