three light modes-white, warm white, and warm-and three brightness levels (low, medium, and high), you can customize your reading experience for any setting. Simply long-press the on/off button to change light modes, and short-press to adjust the brightness. This light features a 360-degree rotating design, allowing you to find the perfect angle, and includes a sturdy book clip that attaches easily to any book or stands alone on flat surfaces. The rechargeable battery provides up to 6 hours of light and recharges in just 1.5-2 hours using the built-in USB charger.