Is Batteries Required : No Is Batteries Included : No Light Source : LED bulbs Origin : Mainland China Item Type : Book Lights Elastic arm and fixing clip The 15 inch gooseneck arm can be bent into any shape to adjust the lighting direction, and can be adjusted to any angle more than 30000 times. Metal clips with anti slip pads can firmly secure any surface and can easily be attached to tables, desks, bedside tables, shelves, chairs, benches, and more. Anti slip pads can prevent scratching furniture. If the arm is bent into a suitable shape, the clamp can stand alone on the table. 10 brightness levels Each lighting mode has 10 adjustable brightness options. The built-in controller can easily switch to lighting mode to meet your various needs, making it perfect for reading, night lighting, work, study, children's sleep, and more when sandwiched between the bedside or headboard. USB power supply Suitable for most devices that support USB ports, such as mobile power supplies, USB chargers, personal and laptop computers, adapters (not included), etc. 【 Reminder: Only used with 5V/2A adapters 】 A 150cm cable with excellent durability and long-distance power supply. Attention: This USB desk lamp cannot be charged! 3 lighting modes Three lighting modes: warm light (3000K), warm white light (4500K), and white light (6500K). Upgrade eye protection lights and locate them in the dark The desk lamp is very suitable for university dormitories or home offices. The LED reading light is made of 18 high-quality LEDs, which will not flicker, shine, or emit ultraviolet light frequently. It can protect vision and reduce eye fatigue caused by long-term reading. The weak blue light on the switch button allows you to find the switch in the dark, and this weak light generates almost no energy consumption.