Specifications: 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 you 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. Item Name: LED Pen Light Material: Aluminum Alloy Power Supply: 2 x AAA Batteries (Not Included) Features: Pocket Size, Lightweight, Useful Item Size: 13.5cm x 1cm/5.31" x 0.39" (Approx.) Notes: You will find more amazing products if you visit our store. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements,allow for slight size differences. Package Includes: 1 x LED Pen Light