Feature nDesigned for daily home healthcare nLight weight and portable size n3.5", 320x240 TFT display, led backlight. nTouch screen nSimple operation and rapid test, ECG can be dectected only be two hands or chest. nBasically analyse and diagnose ECG waveform, heart rate and heart rhythm. nProvide clear ECG waveform used for diagnosing to doctor. nBuilt-in memory for more than 5000 cases of measurement of single channel ECG, depend on the capacity of the SD card. nPower capacity indication and automatic power off in energy-conserving mode. Specifications: nLeads mode:bipolar single channel nHR measuring range:30bpm~300bpm nBandwidth:0.05Hz~150Hz nSampling : 200Hz nClassification: BF nBattery:built-in lithium battery (DC 3.7V) nDimension:130mm(L) × 74mm(W)× 25mm(H) nNetweight: 140g Optional function: n5-lead ECG module and SpO2 module nMonitoring of ECG and SpO2 for a long time. Wireless telecommunication.