The Brother MFC-J3940DW is a multifunction inkjet printer that offers a range of capabilities:

• Print, copy, scan, and fax in A3: It can print, copy, scan, and fax in A3 size.
• Printing speed: It offers printing speeds of up to 28 ipm for black and color.
• Network capabilities: It has built-in Ethernet and wireless connectivity.
• Automatic duplex printing: It supports automatic duplex printing in A3 size.
• Paper capacity: It has a paper handling capacity of up to 600 sheets.
• Touchscreen display: It has a 3.5" TFT Color touchscreen for easy operation.
• High ink yield: It uses high-yield ink cartridges that provide up to 3,000 pages for black and 1,500 pages for color.

Overall, the Brother MFC-J3940DW is ideal for small businesses and workgroups that require a multifunction printer with high performance and flexible capabilities.