3 BRIGHTNESS LEVELS: Features 3 light intensity levels so you can adjust to your preference with a smooth touch switch. Use 30% or 60% mode for reading, switch to 100% to make it a bedside lamp before going to bed. USB Powered and Battery: Rechargeable battery lasts up to 15 (30%), 5 (60%), and 2.5 hours (100%) on a full charge (only 1 hour required). Status display Or connect to an external power source (laptop, outlet, power bank or car charger) using the included USB cable. Reliable and Neat Lighting: High-quality LED bulbs that improve visual clarity and provide flicker-free light. Eliminates glare and reduces eye fatigue. Good for eyesight and the environment. Gooseneck and 360 degree clip: with the flexible 28 gooseneck cm, you can direct the light exactly where you need it. High quality silicone coating and aluminum core, durable. The wide clip opening allows you to attach this lamp to anything (a book, the edge of a table or bed) and save space. < span style="font-size: 1px;">Multifunction Reading/Book/Bed/Night Light/Desk Lamp: Perfect for use at the bedside, on a laptop/tablet/computer, or in the car/tent for read, write, drive, night camp.