| Accepts Paper Size | Legal, Letter |
| Auto Document Feed/Sheets | 35 |
| Compliance, Standards | Energy Star® Compliant |
| Connector/Port | 802.11B/G Wireless, Ethernet, RJ-11 Fax Port, USB |
| Copying Speed (Black) [Max] | 23 pages/min |
| Depth | 15.60 in |
| Fax Memory (Pages) | 600 |
| Fax Transmission Speed | 33.60 kb/s |
| Height | 12 in |
| LCD Display | Yes |
| LCD Display Format | 2 Lines x 16 Characters |
| Machine Functions | Fax, Copy, Print, Scan |
| Maximum Memory | 32 MB |
| Maximum Print Speed (Black) | 23.0 pages/min |
| Model Name/Number | MFC7840W |
| Monthly Duty Cycle (Pages) | 10000 |
| Network Ready | Yes |
| Network Types | 10/100Base-TX Ethernet |
| One Touch Presets | 8 |
| Operating System Compatibility | Windows®, Mac® OS X 10.2.4 and Later |
| Paper Input | 250 Sheet Tray |
| Print Resolution (Black) (Width x Height) | 2400 @ 600 dpi |
| Print Technology | Laser |
| Reduction/Enlargement Range [Max] | 400 % |
| Reduction/Enlargement Range [Min] | 25 % |
| Speed Dial Memories | 200 |
| Standard Memory | 32.0 MB |
| UOM from Inventory Unit Code | EA |
| Weight | 24 1/2 lb |
| Width | 16.90 in |