Material: Aluminum; Tension : 5V; Length : 45cm; Weight : 42g; Switch Type: Touch (Variable Brightness); Power : 1W; Interface: USB; Black color ; Light color: white. The on and off mechanism is activated by touching a sensor at the end of the key, and a dimming function allows adjust it accordingly. Excellent durability - the USB flash drive features 10 LED bulbs and consumes only one watt, enabling efficient use with guaranteed durability of 35,000 hours. Flexible and nimble, this compact light is portable enough so you can use it in many settings such as reading, writing, working, camping and night lighting. The Abt design helps protect the eyes, making direct LED lighting a thing of the past. Very energy efficient, it does not require batteries, it is free. No need to worry about running out of power; it can be used with your laptop, power bank or large wall charger.