5 Adjustable Brightness Levels & 3 Color Modes: Customize your lighting with 5 brightness levels (10%-100%) and 3 color temperatures (1800K amber, 6000K white, 3400K mixed), perfect for reducing eye strain during long reading sessions. USB Rechargeable with Indicator Light: Built-in 500mAh battery provides 8-80 hours of use depending on the setting. The USB charging indicator shows real-time charging progress, ensuring you're always prepared. Flexible Multi-Angle Adjustment: The clamp arm rotates 150 and the lamp head tilts 45, allowing you to position the light exactly where you need it. Durable Metal Clip: The high-quality metal clip securely attaches to books, desks, or headboards without causing damage. Lightweight and Portable Design: Compact and foldable, this lamp is easy to carry, making it perfect for traveling, bedside reading, or outdoor use.