4 port's USB Hub LED indicator to check uplind /downport communication & OCP status easily Each downstream port with OCD (Over Current Detection and OCP(Over Current Protection)function Supporting both full-speed(12M bps) and low-speed(1.5M bps) Mouse move supple flowing freely Family amusement, Work the head to choose Working with Windows98/Me/2000/XP and MAC OS MousePad Size：280mm X 230mm X 6mm 1.5 transparent aluminum platinum USB of Connect line AAS soleplate The bottom Pad defends smooth The USB1.1 connects Cool and blue light Import the black and fine front-panel of PU One upstream port(USB-A male) and four downstream port(USB-A emale) as standard