Very convenient to use LED light for notebook and desktop computers. Soft light evenly illuminates the keyboard or documents while working in the evening and at night and in places with insufficient lighting. Ideal for working on the go. Hose allows easy adjustment of light at any angle. Low power consumption. It requires a USB port. Technical data: Number of LEDs: 10 Length of the flexible headband: 26cm The length of the luminous: 20cm Power supply: 5V / 0.5A (via USB) Requires USB