Discover an perfect gift for medical-professionals: The medical-pen lights with 4cm ruler and pupil gauge are specifically tailored to suit the professional needs of nurses, doctors, and nursing students. Flexing between two light modes, warm and white light, allows you to use this versatile medical-pen in various scenarios. The bright white light is an excellent choice for illuminating while checking the nose. The compact penlight is as convenient as it's practical. The pen cap not only prevents it from undesired activation in your pocket that wastes its battery and creates embarrassing scenes, but also shields it against potential damages due to accidental drop off. Push the button 3 times on the top to alternate between white light, warm light, and off mode after removing the cap. Save the extra cost on batteries with our rechargeable LED pen lights. These penlights come with a built-in battery that can be recharged using the included USB-C cable plugged into any USB socket, power bank, or computer. Stay updated on the charging status with indicators: blue light signifies still charging and disappearance of blue light means the charge is complete. Important: Charge fully before first use. Choose quality with durability: Weighing a mere 18g/0.6oz, carrying it around is a breeze with the attached clip. Let your gift speak your thoughtful care and professional insight. This pen light kit would impress any nurses, doctors, emergency medical-technicians, pediatricians, or nursing students from your friends, families, relatives, or neighbors. Colour:Black Material:Stainless steel Size:13.6cm Package Contents: 2 * Pen Lights 2 * USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.