Versatile - YOUNG4US 4 pcs pen lights with pupil gauge and ruler chart on pen barrels can be used by nurses, doctors and families. The white light can be used to check mouth or ear, and the yellow light can be used to check the eye and measure the pupil size.
Good Craftsmanship - Our pen lights adopt high quality aluminum alloy, which has the characteristics of lightweight, antirust and corrosion resistance. So, our products are durable and you can feel comfortable holding them.
Lightweight Design - Designed with metal pen clip and light aluminum alloy, these pen lights are convenient to carry and you can easily carry them in your pocket, backpack, bag or med kit.
Easy to use - Our led pen light has a push button on the top, so that you can easily switch the light on/off by clicking the button, greatly facilitating the operation and improving the work efficiency.
Guarantee - Please feel free to contact us if you have any question about our products and we provide 12 month money back guarantee for our pen lights.