The definition of 1,2,3 lead ECG devices are not always easy to understand for non-cardiologists as we are. If we have understood it right, a 3 lead-ECG device has 3 channels which are amplified and analyzed independently from each other. https://www.ebay.com/itm/303453638578?hash=item46a73f0fb2:g:KjYAAOSwNw1eJUjd&amdata=enc%3AAQAHAAAA4H7s7GvIQeeSM96MzUrqIZ%2BdQ%2B93E8ETSp9T6pYnMXpWQ934aPhgMKmiNukDkP5rcXhsu0tKX8M8RhiEQkx%2F%2FT033%2FlVpWnMrTOxZ668rfr7fcihZjChMbX6k5KQpaPtWJDkcVjs2WtmC5TCyE5OuWDF3vBeVNIuSsw2NgSj67B0uPPSfTgVKh1U36O%2B5eHs2qp2P%2By7txGPcq9JOJKBMWSVfcvvMD1PKg%2B2ta4COELlbeQyE4p0fRW1MXCyQQ1lI5DODM%2BVYI5aG4mWxwKXrW0epI5AidDG6yPhWEfbOu4E%7Ctkp%3ABk9SR660sM6oYQ Validation papers for sports sensors with ECG devices as a reference device, in which …