This Best Personal Design Mini USB Smart Night Light Cylindrical Lamp - Blue Light - Dry Battery type is great for those who have a limited space in their houses or apartments. The Cylindrical Lamp - Blue Light - Dry Battery type comes with a USB port for quick and easy charging and a built-in low power consumption LED indicating light for night vision capacity. The lamp has an adjustable brightness control which allows for a comfortable light level as well as energy conservation so you can relax after a long day or read a book in a soft light. It also has a sleep mode so you can sleep without having to worry about turning off the lamp and wasting battery power. The lamp is small and compact, but it is big enough to provide just the right amount of light. The lamp is also incredibly durable and resistant to wear and tear. This means that you won't have to worry about replacing it soon due to damage or excessive use. It's also waterproof so you don't have to worry about moisture damage. The Best Personal Design Mini USB Smart Night Light Cylindrical Lamp - Blue Light - Dry Battery type is perfect for those who need a small, energy efficient light without taking up too much space. It's easy to charge and use, and it will last a long time so you won't have to replace it soon.