With on / off switch on each port USB 3.0 (up to 5 Gb/s), backwards-compatible with USB 2.0 and 1.1 Bus-powered (power supply via USB port) An additional power supply is required for USB devices with high power consumption (ref. no. 73304) Chipset: GL3520 Connectors: 1 x USB 3.0 Type-A male - 4 x USB 3.0 Type-A female, 1 x Micro B female (power supply) Includes: USB cable (Type-A male - Type Micro B male, 0.5 m)