Lamp features 30 bright daylight™ LEDs to give you comfortable full-spectrum natural daylight, reducing glare which helps reduce eye strain headaches. The daylight™ light from this lamp significantly increases contrast and helps to make reading much easier. The Foldi™ will give up to 8 hours of bright white light on batteries and unlimited power using the USB connection to your laptop, making it the ideal travel companion or office lamp. Gorgeous slim design, take Foldi™ wherever you go. Battery powered, up to 8 hours of bright daylight. USB powered to light up your computer or laptop area. 30 bright full spectrum daylight LEDs make small text and colors jump out! LEDs use very little energy & never need replacement. Supplied with extra long 1.6m/5.25' USB cable. Plug-in USB power adapter available separately (D/U/A60001). Requires 3 x AA batteries, included in this box.