DES: USB Number Keyboard&Hub Item no:CP077 Features: 1.Key quantity: 17 keys 2.More than 4,000,000 times be used 3.Support system: DOS series,WINDOWS series,UNIX,LINUX 4.Voltage:5V Unit size:128X88X15mm Package: Blister Box(Size:21.5x11.5x2cm) PCS/CTN: 100PCS N.W.: 16.000KGS G.W.: 17.00KGS MEAS: 47x44x29cm