Aten 2-Port USB 2.0 Peripheral Switch US221 Data Sheet

Product codes
US221
Page of 16
- 8 -
Hotkey Operation (Windows Only)
Š
Press [Num Lock] twice to bring the peripheral focus to your 
computer.
Š
Press [Scroll Lock] twice to move peripheral focus from the 
current port to the next port (US-421 only). You must enable 
the Next Port Hotkey to use this function (see p. 12).