... port, Uninterrupted use for 10 hours,Standby time with 1 year. 4.Humanized Button layout Standard QWERTY keyboard the operate habit ... low voltage,testing and OFN model 7.Somatological Design Slick front,cambered back cover,with no-slip mat both of ... power. 12.Application: HTPC,Study Room PC,Tablet PC,Industrial Computer,intelligent TV, Projectors,and so on. Mini Wireless Keyboard With Trackball Mouse