USB Rechargeable and Eco-Friendly Design: Note: It may be too bright for the eyes, if you don't like it. Our care light has a built-in rechargeable lithium battery and you can charge the light with the included USB cable. The light can be fully charged in 2 hours and lasts for 3 hours. The light will dim when the power runs out.Premium Durable Stainless Steel Pen Body: Our pen is made of premium silver stainless steel rather than plastic and aluminum alloy pens. In addition, the overall appearance is stylish and robust. You will definitely love it. It can also be a perfect choice as a gift for your friends and family.Compact and Lightweight: The LED light is designed as an EDC flashlight to fit in your pocket, shirt, pants, and even attach to a keychain. Compact and lightweight which makes it versatile for many applications.Versatile Use of the Super Bright Pen: do not use it to check eyes as it can be bright. The light is not only designed for medical use in hospitals and schools, for nurses and doctors to check the nose, throat, and ears, etc. In addition, the pen light can be used as a flashlight at night for your daily use as the light is very bright.