The Natural Light Smart Lamp D20 is portable, lightweight and foldable. It is ideal for any table top art or craft, and any work that requires attention to small details. Great for needlework, reading and drawing! The 5-step dimmer and 3 color temperatures allow you to customize your light levels for the project at hand. Daylight LEDS provide a comfortable, natural light. This lamp has an internal rechargeable battery and comes with a plug in power supply for outlets, and USB cable for computer or phone charger use. One charge provides up to 4 hours of light.