.TH USBRELAY 1 .SH NAME usbrelay \- get information about and control USB HID relay devices .SH SYNOPSIS .B usbrelay .IR envvar=[0|1] ... .SH DESCRIPTION .B usbrelay without parameters shows information about found USB HID relay devices. .B usbrelay with specified environment variables switches relays on or off. .SH SEE ALSO .br /usr/share/doc/usbrelay/README.md.gz .SH AUTHOR This man page was written by Jan Dittberner for Debian systems (but may be used by others).