In order to assess the health condition of a human heart an electrocardiogram (ECG) is essential. Physicians that act mobile, either between different departments or on house call, are in need of flexible, small and easy to use systems that allow all modern communication options. CardioSecur pro is the first 12-lead ECG for smart terminal devices. CardioSecur pro comprises merely a 200-gram lightweight ECG cable. This connects with the terminal device and activates the corresponding App. An integrated cap may be pulled over the cables to prevent entanglement. Minimalistic shapes underline its ease of use and revolutionize ECG device design.