Product Description Power supply: USB DC 5V Light source: 10 LED Total length: 45cm Light bar length: 14.8cm Flexible neck length: 27cm Material: Aluminum alloy Color: black, Package contents: 1 x USB lamp 1. Material: aluminum alloy, plastic. Flexible metal bellows can be rotated in all directions, bent freely, adjust the angle, no additional fixing tools are needed, flexible and convenient. 2. Connection: USB 5V or 1W. Works great with your laptop, power bank or charger. 3. Easy to carry Flexible, bendable body. This compact size is portable enough to be used in a variety of occasions such as reading, writing, working and night light. The lamp's protective design provides eye protection. This prevents direct LED lighting. 4. Touch screen switch design The on or off mechanism is activated by pressing a sensor at the end of the rod as well as the dimmer function to adjust the brightness accordingly. Exceptional lifespan - The USB flashlight has 10 LED lights that only consume 1 watt of electricity, ensuring efficient use of the 35,000 hour lifespan, no matter what. 5. How to do: 1. Brightness adjustment: Do not release your finger while holding down the power switch. When the light is very strong, it is dimmed. If the light is very dark, it will also be lit up. 2. To turn on or off: Press with your finger and then lift your finger. (Fingers should be kept dry, have no water or sweat).