characteristic 10 universal ECG connectors that can be connected to various electrocardiographs and monitors 12 lead independent electrocardiogram signal simulation 48 types of electrocardiogram waveform selection High level output (200 times the electrocardiogram signal) Amplitude selection: 0.5, 1.0, 1.5, 2.0mV; Accuracy ± 2% (standard), ± 0.5% (optional) Time and frequency accuracy ± 0.5% Respiratory signal simulation Low battery level sound prompt Auto Power Off Simple and convenient operation Easy to carry