Size: 18 * 8.5 * 1.8cm Specification: Material: Metal + ABS LED quantity: 2pcs Warm + 3pcs Cool white LED Power: 1W Battery capacity: 1000mAh Input voltage: DC 5V Charging time: 2 hours Package content: 1x LED Book Reading Light 1x Micro USB Charging Cord (39 inch long) 1x User Manual 1x Carry Bag 1. 3 Color 3 Brightness & Flat Switch Designed with 5 LED bulbs and 9 brightness modes in total, satisfying different light needs in daily life. Press the switch and hold for 3 seconds to change light color (3000K Warm White, 4500K Natural White, 6500K Cool White); quick click to choose brightness (Low, Medium, High). 2. No More Wasting Money on Batteries - Ever Built-in rechargeable 1000mAh Li-ion battery and micro USB port. Enjoy up to 60 hours of wireless reading on a single charge at low brightness (Warm White). 3. No Flicker & Eye Protection Flicker-free, shadow-free, and glare-free lighting. With 3 color temperatures and 3 brightness levels, you can choose the ideal setting to keep your eyes comfortable. Soft diffused light creates a private reading space without disturbing others. 4. Portable & Multiple Use Compact and functional. The flexible gooseneck is 360-degree adjustable to position the light exactly where needed. Ideal as a book light, bedside lamp, music stand light, computer light, desk light, or for headboard reading, camping, children's night reading, studying, keyboard use, painting, tailoring, DIY tasks, and hobbies. 5. Light and Portable Multifunctional Clamp Adjustable clamp fits surfaces up to 4 cm thick. Perfect for books, computers, beds, desks, and more. The reading lamp is also suitable for camping or traveling.