There’s not really such a thing as “standard zigbee,” as the Zigbee protocol allows for multiple different profiles, which do not all work with each other. That said, this one does seem to be using one of the profiles that smartthings supports, “Home Automation Version 1.2,” (ZHA 1.2), so I would have expected it to work at least as an on/off switch.
So I’m wondering if there are some additional parameters that configure the siren itself. 
If you’d like to read more about zigbee profiles, here’s the community FAQ for that. The topic title is a clickable link.
But the short answer is that the newest smartthings hubs support the following zigbee profiles:
ZHA 1.2 , most features are supported, although multiple endpoint devices may require custom code.
ZLL (Zigbee Light Link), most features are supported except for touchlink commissioning and groupcasting. And the same multiple endpoint issues apply.
Zigbee 3.0, A majority of features are supported, but the ones already missing for ZLL and ZHA 1.2 are still missing. Also, smartthings does not support the “green power“ features used by batteryfree devices like the Hue Tap.