❀ Ensures accurate heart rate measurements with our heart rate ruler, designs to assist medicals professional in analyzing heart health. ❀ Crafted from PVC materials, this ruler features clear, wear resistant marking for long terms use and easy portability. ❀ Great for doctors, nurses, and medicals students who require precise heart rate analysis tool. ❀ Perfect for use in hospitals, clinics, and educational occasion where heart rate examinations and research is conducted. ❀ Enhances your diagnostic capabilities with this essential heart rate measurement tool, a must having for any medicals professional., Manufacturer: ZHOUYQX