This product has seven extension USB ports and each output has a switch. Usb2.0 version;Operating System: Win95 osR2/98SE/Me/2000/XP/VISTA, Linux2.4 and os8.5 or laterTransmission rate: full speed 480Mbps, medium speed 12Mbps, low speed 1.5Mbps;Power supply: USB 5V/2000mA;Support overload current and transient current protection.Power-saving and energy-saving USB hub with switch Each USB port has a switched USB hub. USB devices that are not in use at ordinary times can save electricity and are very environmentally friendly. By setting the unused USB device to the off state, the burden on the computer can be reduced and the notebook computer's operating time can be increased. The LED lights are attached to the switches of each USB interface, and the ON/OFF status is clear at a glance.Color: blackMaterial: ABSPackage Contents: 1*USB4 port 2. Splitter with switch Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.