In short, no it is not. It is a standard USB end on the computer side and an auxiliary plug (headphone or speaker) on the end which plugs into your WiFi sensor. While not technically “proprietary” it is a very uncommon USB cable type.
You can check out the full SpotProtect line of WiFi alarm products at the below links:
USA:
http://www.absoluteautomation.com/brands/SpotProtect.html
Canada:
http://www.absoluteautomation.ca/spot-protect-wifi-alarms-s/1868.htm