The keyboard has built in 6 key rollover and is compatible with both Mac and PC. You can pair up to 3 devices with the keyboard but can be used in wired mode (Fn+Tab) when input lag is just not an option. It will hold charge for 10 hours while in use and will stay charged for 360 hours while not being used. Another addition to this newly revised edition is the on/off switch at the bottom of the keyboard that allows you to limit battery usage.