Original Xiaomi USB Light, Xiaomi LED Light with USB Interface Portable Night Lamp for for Laptop PC Notebook Desktop Power Bank Mobile Phone Charger,etc.USB Port Device (Blue) Directly plug the USB LED light into the USB port on your notebook, PC or Power Bank No external power supply is needed. Just easily turn on your notebook, PC or Power Bank to power the light Remains on until you unplug the light or turn off the Notebook, PC or Power Bank Flexible, bendable body, this compact mini size is portable enough for you to use in different occasions such as reading, writing, working, night light