Columns: Comparisons | Hub Base Class | Emulated Class | Semi-DDM Class | DDM Class
USB RE-Enumeration Required | Required on every switch of port | NO, only for keyboard/mouse | NO, for all USB-HID devices | NO, for all USB-HID devices | Supports Hot-Key Command | NO | Yes, only on dedicated keyboard port | Yes, all the console Semi-DDM ports | Yes, all the console DDM ports | Supports Special Keyboard and Mouse functions | Limited* | NO, only acts as standard keyboard/mouse | Yes | Yes | Wireless Combo keyboard and mouse support | Limited* | NO | Yes* | Yes | USB-HID device (other than keyboard/mouse) support | Limited* | NO | Yes* | Yes | USB Touchscreen Sharing Support | Limited* | NO | Yes* | Yes | Drawing Tablet Support | Limited* | NO | Yes* | Yes