With these USB hubs, you can quickly and easily expand your PC or Mac with 4 USB ports. Each port complies with the USB 2.0 standard, offering a data transfer speed of up to 480 Mbit, which is 40 times faster than the conventional USB 1.1 standard. The hubs provide all the advantages of USB: all connected devices are recognized by the hub directly, without complicated or elaborate installation, truly plug and play. Working with peripheral devices such as scanners or printers that comply with the USB 2.0 standard is made easier. Gone are the days when you had to sacrifice speed for the convenience of USB installation. The DUB-H4 and DUB-H7 can also be used without issues for connections with USB devices of the USB 1.1 standard. They manage data transfer so that speed can also be optimized in the "older" USB standard. The hubs feature 4 Type A downstream ports for connecting USB peripherals or additional USB hubs, as well as one USB Type B upstream port for connecting to the computer. By cascading multiple hubs, up to 127 USB devices (scanners, cameras, etc.) can be connected. Extensive diagnostic LEDs always indicate the port status.