Product Description Easy to use. Sturdy clip acts as a stable base, allowing the light to stand on its own, as well as attach to a book, shelf, cupboard, or computer. Rechargeable. USB cable and wall charger are included. No battery replacement. Portable. Its built-in rechargeable lithium battery means it can go where you go. Easy to use. Flexible gooseneck lets you position the light exactly where you want it and keep it there. Multi-function. Ultra-bright LED light provides a clear, bright spotlight for reading in the dark, enjoying hobbies, camping, or using a keyboard. Protect eyes. Natural and Non-flickering light. Dimmable. 2 brightness levels: full brightness and half brightness, which allows adjustment for best comfort and use. Charging time: No less than 2.5 hours by the USB cord or the power adapter(included). Discharging time. About 8 hours for full brightness and 16 hours for half brightness. Extremely long life. Lowers maintenance costs by reducing re-lamp frequency. Eco-Friendly. No lead or mercury. No UV or IR Radiation. Package Includes: 1 x Clip LED Book Light with built-in rechargeable batteries 1 x AC Adapter / Wall Charger (100-240VAC to 5VDC) 1 x USB Cord / Cable (39.37in length) Note: To ensure the discharging time of the battery, please fully charge the lamp before using it for the first time. Please don't use the light during charging.