Review on 💓 Accurate EKG Heart Rate Calculator Ruler: Simplify Heart Rate Measurements by Timothy Cox

Good quality, great information. Together with other reference materials, they fit perfectly into my leisure pants. You don't need those calipers! It's helpful to use from time to time at work, since with EKG tests you don't have the luxury of displaying data on the test print you're looking at. You probably won't be allowed to use this tool, but if you have it handy and use it from time to time, you won't forget all those numbers and information for a quick calculation when it's just you, a calculator, and maybe a caliper.