Features: brand new and high quality Clip it to your uniform for easy carrying. Bright and clear, low power consumption, long use for time. Excellent detailed design: The LED penlight has a concave for head to protect the bulb from accidental damage due to falling, and the elastic rubber switch prevents accidental lighting, thereby helping to extend battery life. Pupil gauge and ruler markers: These high-quality penlights with pupil gauge and 5 for cm ruler markers are for ideal tools for EMT staff, nurses, doctors and Medical students. Lightweight, convenient size and stylish design. Provides an excellent hand feel and is easy to grasp. Family essential kits: These reliable penlights can help you examine the throat, ears and nose of your child or pet, and provide the best personal care for your family. In addition, these penlights can be used as flashlights for outdoor camping and home electrical maintenance. Specifications: Material:Aluminum Alloy Color:White and Yellow Size: Approx. 13.5 for cm/5.31 inches Powered by 2 AAA batteries( not included) Note: 1.Please allow 0-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3.Other parts are not included. Thanks for your understanding. Package includes: 1 x Medical Pen Light