Spec:
Item Type: Keyboard Mouse Set
Material: ABS
Connection: 2.4G
Key Life ≥ 10 Million Times
Number of Keys: 78 Keys
Compatible: for Windows, for OS X
Mouse Battery Specification: 1 x AA (Not Included)
Keyboard Battery Specification: 2 x AAA (Not Included)

How to Use:
The 2.4G receiver is plugged into the USB port and start to use.

Package List:
1 x Keyboard
1 x Mouse
1 x 2.4G Receiver

Notice:
The mouse and keyboard are shipped without batteries