Basic characteristics 10 universal ECG connectors that can be connected to various electrocardiographs and monitors 16 types of electrocardiogram waveform selection High level output (200 times the electrocardiogram signal) Amplitude selection: 0.5, 1.0, 2.0mV; Accuracy+2% (standard),+0.5% (optional) Time and frequency accuracy ± 0.5% Respiratory signal simulation (optional) Energy saving design, 2 AA batteries, can be used continuously for more than 240 hours, supports rechargeable and non rechargeable batteries, low battery level sound prompt Auto Power Off Simple and convenient operation Easy to carry