ECG 7-step ruler designed with the scientific 7-step ECG interpretation method. It provides clear visual reference points for the key points and a step-by-step follow-up process, helping you analyze ECGs quickly. Portable and transparent design. ID-sized transparent format fits into a badge holder, pocket, or tool bag, ensuring quick access wherever you are. Ideal for on-the-go use in the workplace, classroom, or clinical setting. Easy to read reference. The ruler lets you measure heart rate and view PR intervals, QRS complexes, QT intervals outside the normal range, and ST segment elevation or depression. It makes a practical addition to your ID badge. Durable and high-quality material. Made of sturdy transparent PVC, this 7-step ECG ruler is wear-resistant, waterproof, and easy to clean, maintaining its clarity and functionality in demanding environments for long-term use. Use scenarios - During patient rounds in clinics to perform fast ECG checks. - In training sessions or classrooms to demonstrate interpretation steps. - On-site monitoring in workplaces or classrooms for quick reference and teaching aids.