Features & details 2.4GHz Wireless Connection: With included USB interface adapter, no driver needed, plug and play. 2.4GHz wireless connection, enjoy up to 9 meters wireless control. Wireless Mini Keyboard: The mini keyboard ensures convenient typing with classic keys and multimedia keys, and you can control your devices on your couch. Optical Trackball Mouse: Optical-sensor trackball controller strengthens the touch experience and ensures flexible control of the laptop or HTPC when there is no mouse. Scroll Wheel Design: The bottom right corner of the keyboard has the mouse left and right keys and scroll wheel which can randomly turn between two directions. Wide Application: Compatible with Android, Windows and Linux OS. Suitable for XBOX 360, for PS3, HTPC / IPTV, Android TV Box, Laptop, projector and so on.