Hi,
I guess you mean a pendant. If that is the case then the only wireless pendant that is known to work, sort of,
is the XHC one. Note that XHC do not provide the plugin, that was provided by a user who published it for use
by the community, but is not really supported.
All in all the XHC products are not recommend for Mach4, they are just not stable enough and XHC has demonstrated no inclination
or ability to fix the plugins.
I use a VistaCNC P1A wired USB pendant with Mach4 and it works well and has done so for over five years.
Craig