USB Rechargeable & Eco-Friendly Design: Note: It may be too bright for eyes, if you don't like it. Our nursing light pen has a built-in rechargeable lithium battery, and you can charge the light with the included USB cord. The lamp can be fully charged in 2 hours and lasts for 3 hours. The light becomes dimmer when the power is off. Premium Durable Stainless Steel Pen Body: Our pen is made of premium silver stainless steel than plastic and alloy pens of aluminium. Also, the overall look is nice and sturdy. 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 your pocket. attach to a key ring. Compact and lightweight making it versatile for many applications. Multifunctional use of the super bright pen: do not use it to check eyes as it may be bright. The lamp is not only designed for medical use in hospitals and schools, for nurses and doctors to check nose, throat and ears etc. Besides, the penlight can be used as a flashlight at night for your daily use because the light is very bright.