Specification Mouse spec： ● wireless technology：2.4GHz ● working distance：10m ● unite size：79（L）×53（W）×30（H）mm ● unit weight： 38g（not include battery，receiver） ● button：3 ● transmission: 1M bps ● keystroke route：0.8mm ● keyswitch operating force：70±5g ● key life：over 3 million times ● rated working voltage/current：DC 3V/ 9mA ● power supply： battery ● colour：black Keyboard spec： ● wireless technology：2.4GHz ● working distance：10m ● unit size：317（L）×115（W）×17（H）mm ● unit weight：280g（not include battery，receiver） ● button：87 ● transmission: 1M bps ● keystroke route：3.0mm ● keyswitch operating force：55±5g ● rated working voltage/current：DC 3V/ 0.85mA ● power supply： battery ● colour：black System support： ● Windows ME/ 2000/ XP/ Vista /7 Certificate： ● FCC/ CE Packing： ● 2.4G wireless keyboard ● 2.4G wireless mouse ● receiver ●battery