Adding Wireless router to wired network with a domain needs to have DHCP

My boss wants to add a wireless router to our wired network with a domain. I am not too familiar with wireless routers. I would think most of them would do the job, but to make sure, it would have to have DHCP capability, and i would have to be able to assign DHCP range. It would just be used for guest internet access. Range should not matter, would have to work only in the office. Does it matter that i have a domain, or if i manually assign the IP Address and gateway to router, it would work right? I would think any router should have these capabilities, but just want to make sure. Any recommendations? Thank you.