It's listed as 10/100/1000M and was advertised as Mikrotik (Netgear, Cisco, etc.) compatible but obviously there is compatible and there is actually works. I was eventually able to get it to link to a Ubiquiti switch, by setting the CRS112 SFP interface to fixed 1Gb/Full with the Ubiquiti in auto, but I had to reboot the CRS to get it to link. I tried every possible combination of fixed/auto between the CRS112 and RB750, rebooting both devices with each new attempt, but was never able to the CRS to link up with the Rb750. I also tried putting the SFP into a Netgear switch and did not get it to work in the Netgear either, but I didn't spend anytime trying different settings. At that point I just chalked it up to incompatible SFP.
I have ordered a couple of the Mikrotik SFP modules recommended above and will try them tomorrow when they come in.