Malker Book Light, Portable Reading LED Light,Energy Saving, Night Book Reading Lamp Laptop Computer Keyboard Mini USB Lamps Led Lights (Green) Lambency Lampshade design provide eyesight protection; avoiding direct LED light Flexible, bendable body, this compact mini size is portable enough for you to use in different occasions such as reading, writing, working, night light Super power saving, No batteries needed and charge free. NO worried about the power running out of; Works great with your laptop, power bank or wall charger It can be used for any 5V USB .Laptop ,power bank or USB charger etc.