Directly into the USB port to take power from USB， no battery 

 

 

Notebook desktop can be used， desktops can put desktop oh， otherwise the line would be too short， this product supports the use of mobile power plug. 

 

Night time use， will not hinder people around sleep. 

 

When using a laptop， it is icing on the cake， not afraid of no light invisible keyboard， light， bright and soft， do not hurt the eyes 

 

Especially suitable for night workers to use， easy to carry， exquisite beauty， Plug and Play 

 

Exquisite metal bar while a USB cable， connected to the USB port， free bending， adjusting the angle of the fixed method does not need clips， glue， etc.， very convenient.