Product Description Material: Plastic Size: 11.5*5.8*2.1CM Voltage: 3.7V Lumens: 16 lumen Battery: 3.7V 200mAh Power: 0.2W Charging time: 1.5 hours Working time: up to 8 hours Mode: Two adjustable speeds Color Coortie: First gear, 4000K; second gear, 1550K Colour: white Quantity: 1 piece Package Definition: 1*book lamp,1*manual(with battery) 1.USB rechargeable Easy charge with built-in USB, directly connect to laptop, power bank, car charger or a USB socket for charging, no additional cables are required. 1.5 hours charging time approx. Working time up to 8 hours (at brightness setting). 2.Compact LightweightMini size design, 11.5*5.8*2.1cm, small and lightweight, great for clipping on the book when reading. reading at night, it can be folded completely flat and slim, portable for reading on the plane, train or in the back seat of a car while traveling. 3.Flexible Lighting Angle Design fully flexible, the LED lens can be rotated 90 left and right horizontally and 45 down; 350 flexible stand can be bent to any angle for optimal viewing without having to constantly reposition the light. 4.Adjustable Light ModesSoft white light, selectable brightness, bright soft warm creates a private reading space for your bedtime reading lets you choose the perfect brightness when reading; enjoy your reading time in bed without disturbing your roommate. 5.Gift for kids: Compact size and multi-function, this book lamp is a good gift for avid readers kids who like to read everywhere. It can also be used as a bookmark or mini torch in the event of a power outage.