Wrong frequency. They will not work with SmartThings Unless you add an additional server device, and that’s a lot of work.
SmartThings works directly with Z wave devices, zigbee devices using the “Zigbee home automation” profile, some other devices like LIFX and Lutron where the two companies have created an official integration. It can also work indirectly with devices which have an IFTTT channel or a cloud with an open API. See the following: