Escolite Pen Light,LED Penlight Medical with Pupil Guage for Doctors Nurses White,Golden and Purple LED color:White Penlight NW:17 g Shell color: Gold and Purple 2pcs in pack Sealed concentric beam,Imprinted pupil gauge,protable in pocket Activated by depressing cap button,Replaceable 2 pcs AAA batteries.(Included) Size:13.8cm (5.5&#034;)Length x 1.25cm(0.49&#034;)diameter 2 x Diagnostic Reusable LED Penlight with Pupil Gauge Gold and Purple 4 x AAA batteries Sturdy and durable aluminum alloy material instead of plastic. A metal pocket clip design, allowing you to carry your penlight with you wherever you go. The pupil gage printed on side of pen allows for proper assessment of pupil size, and the built-in 5cm ruler adds a measure of convenience and utility. Push-button on/off switch, easy to control. Whether for Christmas, birthdays, or just to show that you care, Escolte&#039;s nursing penlight makes a great gift that can be used every day. Theyll appreciate the simple, white design, portability, and the bright white light powered by LED technology. The LED bulbs are long lasting as well, ensuring that your gift can be appreciated for years to come.