Product description Power supply: USB DC 5V Light source: 10 LED Total length: 45cm Light stick length: 14.8cm Flexible neck length: 27cm Material: aluminum alloy Color: black, gold, silver Package content: 1*USB light 1.?Material?: aluminum alloy, plastic. Flexible metal bellows can be rotated in all directions, bend freely, adjust the angle, no additional fixing tools are needed, flexible and convenient. 2.?Connector?: USB 5V/1W. Works great with your laptop, power bank or wall charger. 3.?Easy to carry??Flexible, bendable body, this compact size is portable enough for you to use in various occasions such as reading, writing, working, night light. Lamp shield design provide eye protection; This prevents direct LED lighting. 4.?Touch switch design?The on / off mechanism is activated by touching a sensor at the end of the stick, as well as the dimmer function to adjust the brightness accordingly. Exceptional longevity - The USB stick light has 10 LED lamps that pull only 1 watt power, ensuring an efficient utilization of the 35,000 hour durability, no matter what. 5.?How to use?: 1. Brightness adjustment: Do not release the finger while holding the switch button. If the light is very bright, it will be dimmed. Similarly, if the light is very dark, it will be brightened. 2. Turn on or off: Tap with your finger and then lift your finger. (Fingers should be kept dry, do not have water or sweat).