Opoway Nurse Penlight Medical White Led Pen Light with Pupil Gauge Measurements for Doctor Stethoscope Healthcare Nursing School Students Reusable Batteries Free Easy to Use: Compare with the other types, this reusable LED Nurse penlight is push button to click on and off instead of holding the clip down to keep the light stay on throughout the entire use, which makes use way more efficient and simply. This penlight has a silver metal clip rather than plastic that you can clip on your shirt or scrubs, no need to worry clip will break in your line of work. Useful: An extremely functional handy tool especially for those people who works in the medical field, help you in labs as well as clinical. Design: Clean sleek design and the pupil gauge on the side is also convenience to pinpoint lens directly illuminates ears and throat. Helpful: The medical led penlight has a handy dandy little pupil dilation gauge which is incredibly helpful if you are learning how to visibly measure pupil dilation. Convenient: Small and compact, easily fits in your pocket and can be clipped onto the inside of your scrub pockets making it easily accessible.