Totally wireless freedom 2.4GHz digital radio technology The keyboard operation distance: above to 10m Electronic data: +3V Compatibility: IBM AT, Windows98/2000/XP Communication: USB Keys High: 5.0mm Keyboard N.W.: 320g Layout: 104 keys + 18 keys multimedia Keyboard color: orange, any color as required Packing: Color box (retail packing) 20pcs/packing Dimensions: 46 x 40 x 43cm N.W.: 6.5kg G.W.: 11.0kg Certificate: CE & RoHS