Description Portable electrocardiograph (ECG) machine designed for families and individual users. * Not suitable for children. It is really helpful for preventing cardiovascular diseases at home since it can monitor the electrocardiogram (ECG) of users anywhere in a simple way.The device can record, analyse and display the ECG wave (electrocardiographic waveforms) of the users and capture pathological ECG waves if they suffer from heart disease or other unpleasant symptoms. This ECG machine can be easily carried thanks to its small size, which widens its scope of use. It will help to save you physical examinations. Features: Elegant design, practical operation, lightweight and user-friendliness. It monitors and records ECG and HR waves (Heart Rate) anytime, anywhere. Built-in, high-capacity rechargeable lithium battery. It can record up to 200 ECG waveforms after a single recharge. Scope of use: Environment Family, medical-clinical, hospitals. (The device cannot replace a general electrocardiogram for clinical examination). Target group People with high blood pressure or high workload, patients with heart disease, middle-aged or elderly people, individuals with poor health. Used for: The device is used exclusively for ECG monitoring and data storage. It is NOT a therapeutic instrument. The operation method is simple and requires little effort on the part of the user. Technical data: Operation environment: Temperature: +5 ºC ~ +40 ºC Relative humidity: 25% ~ 80% Power supply: Built-in, rechargeable lithium battery, voltage: 3.7V Transport and storage environment: Temperature: -+40 ºC ~ +55 ºC Relative humidity: ≤95% Calibration voltage: 1mV±5% Sensitivity: 10mm/mV±5% Typical frequency modulation: Standard: 10Hz; 1Hz~20Hz; (+0.4dB,-3dB) Noise level: ≤30μV Common mode rejection (CMRR): ≥60dB Scan speed: 25 mm/s±5% Sample rate: 250 points/s Range of heart rate (HR): 30bpm ~ 300bpm, error: ±1bpm or 1% Type of protection against electric shock:  Internally powered device Degree of protection against electric shock:  Applied parts type BF Degree of protection against water ingress: IP22