Shop 24 X 31 X 59 Inch, 0.05 to 100 Hz Frequency Response, X2, X1, X0.5 (X1-10 mm/mV) Gain, 1 mV for 200 msec Calibration Signal, 14 Inch diagonal Size, Protected to 360 Joules, 2.5 or 5 secs Lead Group Length (Auto 12-Lead)