Features: 1.English menu display; 2.Lead off/on signal by indicator light; 3.Selectable multi-recording modes:single channel, 2 channels,2 channels + rhythm; 60 sec compressible: select simultaneously acquisition of 12-lead ECG signals; 4.Save the half record paper and the half record time; 5.The body check mode can record the patient ECG 15 seconds/each; 6.Thermal printer (dot array),40 dot/mm,precise waveform; 7.Rechargable battery pack; 8.Hidden handle. Specifications: Lead: Standard 12 leads Acquisition mode: simultaneous 12 leads Operating mode: auto/manual Recording format: auto/manual/simultaneously 60 sec compressible LCD display: operation mode/ Status,HR Input Condition: against defibrillation Input impedance: >50MQ Patient Leakage Current: 3.2 s CMRR: > 100dB Filter:50Hz or 60 Hz (-20dB) prift(0.5Hz-3dB) Sensitivity Option: Auto,2.5,5,10,20,40mm/ mv=2% Resist to polarization voltage:=500mV Electrical noise level: