ECG Monitor is intended for measuring and recording the ECG signal and determining average heart rate. Advanced measuring technology provides steady and accurate ECG waveform in about 30 seconds. Its user-friendly design allows patients to use by themselves at home. Features: Small in size, light in weight, easy to carry with you. One key easy operation, about 30s quick measurement. 2.8" color LCD screen clearly displays ECG waveform and interpretation of results. 17 types of measurement results can be presented. Data storage of 300 waveforms, which can be reviewed, copied, uploaded and deleted. Storage data can be easily uploaded to the computer by the provided USB cable. Adjustable screen brightness, convenient for both day and night. Supports time display and setting. Battery operated, auto shutdown after about 1min idle time to save power. Note: Size and color may differ from the pictures due to manual measurement and different light conditions. Thanks for understanding. Specifications: : Color: Orange Material: ABS Screen: 2.8" Color LCD, 240x160 Channel: 1 Electrode: 3 Metal Electrodes Heart Rate Measuring Range: 30-240bpm, 2bpm or 2 percent Accuracy Display Scale: 5.0mm/mV 10 percent Common-mode Rejection Ratio (CMRR): 60dB Waveform Sweeping Speed: 20mm/s 10 percent Input Loop Current: 0.1A Input Impedance: 5M (single ended) Results: 17 Data Storage: 300pcs Waveforms Data Upload: Data Management Software Power Supply: 2 x AAA Battery (not included) Item Size (without battery): 125 x 70 x 21.5mm / 4.92 x 2.76 x 0.85in Item Weight: 93g / 3.29oz Package Size: 14 x 9 x 6cm / 5.51 x 3.94 x 2.36in Package Weight: 276g / 9.72oz Package List: 1 x ECG Monitor 1 x USB Cable 1 x User Manual (English)