... machine. 2. Portable ECG monitor. 3. Medical Use. Digital 12-Channel ECG Machine(WK-5000)Features: • Solid——Military specification materials and ... supplyUSBFilterAC(50Hz-20dB),EMG:25-45Hz(-3dB)Safety levelIEC II,BF typePaper speed12.5,25,50mm/sDepolarization voltage±300mVTime constant>3 ... .29kgFrequency response0.05Hz-150HzGross weight1.5kg WK-5000 Digital 12-channel ECG Machine