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SPECIFICATION: RF Digital Radio technology provides flawless communication without direction limitation Working frequency: 27MHz Working distance: 1 ¡V 3 metres ¡P IBM PC/XT/AT compatible .¡P Multimedia-Internet Keyboard with easy touch hot keys ¡P High-quality membrane keyswitch ¡P Multiple language versions available ¡P Slim design make to save your desk space 3D Optical Mouse with battery charger ¡P Resolution: 800 dpi ¡P Switch life: 1 million cycle |