<ul><li>Energy supply: dry batteries (double AAA batteries)With power switch, you can turn off the power when not in use to save power.Ultra-thin design,The keys use scissor foot structure, keyboard feels very goodBeautiful appearance, fashionable and extremely delicate.Compatible with computers. All models, systems, Microsoft systems, Android systems. No drivers required,, they can be installed directlyFor tablet . mobile, computer. Laptops etc.</li></ul>