Feature: The dots on side are part of a pupil gauge to help determine the size of a patient's pupil when doing a neuro assessment. LED Medical Penlight with push top on and off switch, metal pocket clip, easy to use and carry. High quality aluminum alloy body and sleek appearance, give u pretty good texture and feels, very sturdy and durable. Small and compact design,make nursing penlight great to have on hand, also easily fits in your pocket,bag and First aid kit etc. The design of LED convex bulb, bring you much nice bright white light that isn't blinding than concave bulb. Description: Material: aluminum alloy LED color: Bright White,Bright Yellow Shell color: sliver,blue,purple,black,green,red,yellow,pink Push-button on/off switch, easy to control. Power:2*AAA battery(battery not include) Package include: 1x LED Medical Pen light Notes: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!