Features: Twelve Channel digital ECG machine with Interpretive. Designed with a high-resolution thermal printer to print out ECG waveform, annotation as well as related parameters for diagnosis reference. Digital isolation technology is adopted to minimize time/temperature drift of components so as to promote adaptability of the unit tocircumstance. Digital filter for effective inhibition of baseline drift,interference, as well as automatic position of baseline. Self-test upon powering on.Automatic measurement and interpretation of ECG waveform to relieve doctors from strain. Multiple print formats include 6-channe and 12-channel. AC/Rechargeable battery for continuous examination when AC power supply is unavailable. Safety level for ECG-912A corresponds to Class I, type CF.