GE Marquette Mac 3500 Features Easy to read color screen displays 12 leads at a time. Marquette 12SL ECG simultaneous 12-lead ECG analysis program for adults and pediatrics. 12SL with Gender-Specific interpretation makes detecting AMI in women easier. Marquette Hook-up Advisor signal quality analysis program reduces poor waveform quality during ECG recording. GE Marquette Mac 3500 Specifications Technical Data Paper Size: 8.45in x 11in z-fold Print Device: Thermal dot array Channels: 3, 6, or 12 Chart Speeds: mm/s: 5, 12.5, 25, 50 Dimensions Cardiograph: 15in L x 15.6in W x 7.6in H Weight: 15lbs (7kg) Power Requirements 115/230V AC +/-10%, 50/60Hz at external power source