What is ECG? An electrocardiogram (ECG Machine) is one of the simplest and fastest tests used to evaluate the heart. Electrodes (small, plastic patches that stick to the skin) are placed at certain spots on the chest, arms, and legs. The electrodes are connected to an ECG machine by lead wires there. The electrical activity of the heart is then measured, interpreted, and printed out. No electricity is sent into the body.Product information Power supply mode: dry battery Specifications: Taiwan Material: Medical PVC Applicable parts: hands Color: PC-80B inner version, PC-80B outer version Power supply: DC 3V 2 AAA batteries Heart rate range: 30bpm~ 240bpm Measurement time: 30 seconds or continuous measurement ECG Scan Machine Heart rate accuracy: +2bpm Measurement results: 17 types Data storage: 1200 or 10-hour monitoring waveforms can be stored Size: Length: 125mm Width: 70mm Height: 21. 5mm Measuring electrodes: 3--integrated metal electrodes or an external three-lead wire Data upload: ECG scan machine standard data analysis software and transmission kit Package: Heart rate monitor*1 Lead wire*1 Host *1 Battery*2 Data connection line*1 Electrode sheet*1 Packing box*1