1, Hand-Held Single Channel ECG 2, High precision 3, CE & ISO certificate 4, Easy carry and easy use Technical Parameters 1, Input circuit : Floating2, Calibrating Voltage :1mV ?%3, Input current :<100nA4, CMRR :>103dB5, A/D :12bit6, Frequency Response: 0.05Hz--150Hz7, Filter :AC 50/60Hz EMG: 35-4Hz8, Skin Voltage Tolerance :?00mV9, Sensitivity Setting 5 ,10 ,20mm/mV, conversion deviation?%10, ...