SECG MECG CMRR Box Accuracy of signal reproduction x Input dynamic range and differential offset voltage x Input impedance x Input NOISE x Multichannel crosstalk x GAIN control and stability x Sweep speed x Frequency and impulse response x GAIN INDICATOR x Common mode rejection x Baseline reset x Pacemaker pulse display capability x Rejection of pacemaker pulses x Synchronizing pulse for cardioversion x Heart rate range, accuracy, and QRS detection range x Channel height and aspect ratio x Tall T-wave rejection capability x