Enhanced EKG Interpretation: Master heart rate measurement and EKG analysis with precision using the 7-step ruler's clear reference points for PR intervals, QRS complexes, QT intervals, and ST segment changes. Portable Transparent Design: Crafted in an ID-sized transparent format, this ruler seamlessly fits into badge holders or pockets for on-the-go use in workplaces, classrooms, or clinical settings, ensuring quick access to vital EKG interpretation guidance. Scientific 7-Step Methodology: Designed with a systematic 7-step EKG interpretation method, this ruler simplifies complex cardiac data analysis by providing intuitive reference points, aiding in efficient EKG evaluation and diagnosis. Durable Plastic Construction: Constructed from sturdy and waterproof plastic material, this ruler ensures long-lasting clarity and functionality even in harsh environments, making it a reliable tool for continuous EKG education and practice. Versatile Learning Tool: Ideal for healthcare professionals and enthusiasts alike, this 7-step EKG ruler serves as a valuable companion in various settings, from educational institutions to medical facilities, facilitating comprehensive EKG understanding and interpretation. Description: Introducing the EKG 7 step ruler, a must-have tool for accurate heart rate measurement and EKG interpretation. This transparent reference card is designed for easy readability, allowing you to analyze PR intervals, QRS complexes, QT intervals, and ST segment changes with precision. Crafted from durable and waterproof plastic, this EKG ruler is built to last in various environments. Its portable ID-sized format makes it convenient to carry in your badge holder or pocket, ensuring quick access in any setting. The scientific 7-step interpretation method provides clear reference points for analyzing EKG step-by-step, making it ideal for healthcare professionals and EKG learners alike. Enhance your EKG education and practice with this reliable companion that simplifies complex interpretations in classrooms, hospitals, and beyond. Master EKG analysis effortlessly with the EKG 7 step ruler at your fingertips. Item Name: 7 Step Ruler Material: Plastic Features: 7 Steps Design, Easy to Read, Portable Size Size Details: 8.6cm x 5.4cm(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: A: 1 x 7 Step Ruler or B: 1 x 7 Step Ruler 1 x Storage Box or C: 2 x 7 Step Ruler 2 x Storage Boxes