Wireless Ultra-thin Keyboard Mouse Combos Keyboard Spec Wireless technology :2.4Ghz Working distance :10m Unit size :379(L) x 116(W) X 21(H) mm Unit weight :360g (not including battery ,receiver ) Button :105 Keyswitch operating force :about 50g Rated working voltage /current: DC 3V/0.85mA Power supply :2AAA batteries Mouse Spec: Wireless technology :2.4GHz Working distance :10m Unit weight :55g (not including batteries ,receiver ) Button :4 Keystroke route :0.8mm Keyswitch operating force :about 70g Key life :over 3 million times Rated working voltage/current:DC 3V/9mA Power supply :2AAA batteries Mini receiver: Mini in size ,yet supports advanced 2.4 GHz wireless technology . Automatically activates desktop set once plugged into computer . Package * Wireless Ultra-thin Keyboard x 1 * Wireless mouse x 1 * Wireless receiver x 1 * Keyboard cover x 1 This design is high-grade and saves working space . Keyboard is ultra-thin ,sensitive and comfortable. System compatibility: Windows98SE/Me/2000/xp/Vista