<p>EKG caliper measuring tool set: you get 2 EKG calipers with a scale coat, and 2 transparent ECG rulers, which can be applied to measure ECG waveform; The EKG caliper pen has a clip that can be easily fixed to the nursing uniform</p> <p>Adjustable and Convenient: which is convenient to carry in the pocket; The needle tip is fixed with screws, and the length of the 2 needles can be adjusted; The 2 corners are fixed with screws outside, which is convenient to adjust the tightness of the 2 corners;</p> <p> and Portable: which can be suitable for rapid basic ECG measurement on the paper and screen of patient monitor defibrillator; Also suitable for routine use and emergency ; It has the advantages of light weight and small volume</p> <p>Reliable and reusable: the transparent ECG ruler is made of large-scale transparent plastic, which is reliable and has a protective sleeve for longer service life; The 2 legs of the ECG calipers for nurses , which is reliable to use, wear- and not easy to blister</p> <p>Thoughtful gift: the ECG calipers measuring tool for nursing is a thoughtful gift for your friends who are nurses or nursing students, which is a practical gift for them</p> <p>Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you!</p> <p>Material: Metal+Plastic</p> <p>colour: black+pink</p> <p>Package Contents: </p> <p>2 x ECG Sub-Gauges</p> <p>2 x heart rate rulers</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>