List the device you would like to redirect using lsusb
[user@hostname ~]$ lsusb
Bus001 Device004 : ID 258a:0027 SINOWEALTH Wired Gaming Mouse
Add the following to your virtsh edit XML file
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<address bus='1 ' device='4 '/>
</source>
</hostdev>
Disconnecting the device from your Virtual Machine will reconnect it to the source system.
