... rechargeable Libatteries,recharged by mini usb port, Uninterrupted use for 10 hours,Standby time with 1 year.4.Humanized Button layout ... the habit of users.With more Humanized design:L/R hand design,OFN/FN,Enter, Page,etc.5.Fn Keyboard lock function Support ... (similar with the Fn button of notebook)10.Buttons backlighting Design With unique Buttons backlighting design,can work in the darkness, 2 seconds ...