C-PEN Portable Pen ECG device, that is designed for diagnosis of heart rhythm disorders (cardiac dysrhythmia) by Telmed Company with its more than 30 years of experience. It is a single-channel, portable and quite small ECG device. Doctors, other medical personnels, and even the patient itself can take ECG measurements in a very short time thanks to this device. The device can be used in urgent health care services, clinical actions and home health care services, and enables the patient to be diagnosed quickly and intervened without delay with its portable design and German technology. Also, the C-PEN Portable Pen ECG Device has an efficient feature that enables data transfer.