Product Material: Plastic Size: 11.5 * 5.8 * 2.1 CM Voltage: 3.7V Lumens: 16 lumens Battery: 3.7V 200mAh Power: 0.2W Charging Time: 1.5 hours Working Time: Up to 8 hours Mode: Two adjustable gears Color Temperature: First gear, 4000K; Second gear, 1550K Color: White Quantity: 1 piece Package Contents: 1 * book light, 1 * manual (with battery) 1. 【USB Rechargeable】: Easily charge with the built-in USB. Connect directly to your laptop, power bank, car charger, or USB outlet – no extra cables needed. Approximately 1.5 hours charging time for up to 8 hours of working time (at brightness setting). 2. 【Compact & Lightweight】: Mini-sized design (11.5 * 5.8 * 2.1 cm), small and light, perfect for clipping onto a book while reading at night. It folds completely flat and thin, making it portable for reading on planes, trains, or in the back seat of a car during travel. 3. 【Flexible Lighting Angle】: Fully flexible design. The LED lens can rotate 90° left and right horizontally and 45° downwards. The 350° flexible holder can be bent to any angle for optimal viewing without constantly repositioning the lamp. 4. 【Adjustable Lighting Modes】: Soft white light with adjustable brightness, and a soft warm light that creates a private reading space for bedside reading. Choose your perfect brightness for reading and enjoy your reading time without disturbing your roommate. 5. 【Gift for Kids】: With its compact size and multiple functions, this book light makes a great gift for avid young readers who love to read anywhere. It can also be used as a bookmark or a mini flashlight during power outages.