Extender for amplifying your web access control installation, enabling you to control more door relays online.
Features | Easy to mount
The WS4 extender can be easily mounted on top of the WS4-1D, to convert it into the WS4-2D. That means that you would be able to pass from controlling a 1 door relay system to a 2 door relays one, by simply adding the extender. And the final result would look as you can see in the picture.
XPR Group WS4-1D Webserver Access Controller
