1.Decent design mini size wireless keyboard 2.Hand held style 3.15 multi-media keys 4.Natural trackball with two push buttons on the left and right conner 6.With easy scroll wheel 7.Plug and play 8. 10m wireless distance Product parameters: Connection:2.4G wireless Size:26 x 12 x 2.5 cm Product weight:210g Weight after packing:300g Mouse DPI:1200 Tracking method: Mouse trackbal Power suppply:2pcs AA battery Color:Black Button lifetime:8 million times System requirements:Windows 2000, Me, XP, Vista, Win 7, Linux, Android and Mac or higher