Problem with Cisco EHWIC-4ESG

Just wondering if the EHWIC-4ESG be used in a Cisco 800 router.I want to add at least one additional port, so the 4ESG would be a good fit.If i can't use EHWIC in it, which router should i use ? Is Cisco 1941/K9 router ok ?

Should work. You could use the 1941. If you need extra ports, you could also get a switch to.