It's a Brother HL-2270DW:
http://www.brother-usa.com/Printer/ModelDetail/1/HL2270DW/

It's a black & white laser printer. It does duplex printing. It
supports ethernet and wifi networks. It's meant for small offices with
medium usage.

There's a spare empty toner cartridge in case we find a good deal on refills.

It is configured to connect to the SSID "sudoroom" and take static IP
address 192.168.1.8. There are two valid usernames, "user" and
"admin", and right now both have the password "sudoroom" (this should
probably change).

new wiki page: https://sudoroom.org/wiki/Brother_HL-2270DW