The U2H401S-H works backward compatible either when any one of downstream ports are connected to an USB 1.1 compliant device, or when the upstream port is connected to a USB 1.1 compliant host.

• Compliant with USB 2.0(Data Rate 1.5/12/480Mbps)
• 4 (max.) downstream facing ports
• All downstream facing ports can handle high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) transaction.
• Supports split transaction to handle full-speed and low-speed on downstream facing ports when Hub controller is working in high-speed mode.
• One transaction translater per Hub and supports four non-periodic buffers
• Supports self-powered mode.
• Supports Over-current detection and Individual / Gang power control
• Supports downstream ports status with LEDs (Amber and Green)
• Supports Energy Star for PC peripheral system.