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: