Product details
- Brand
- Brother
- Color / finish
- White / gray
- Product type
- Digital color all-in-one printer
Description
The MFC-L3720CDW brings color documents and everyday office scanning into one machine. Use it for proposals, invoices and handouts when you want toner-based output plus a document feeder for multi-page originals. The touchscreen keeps copying and scanning controls accessible without navigating a computer for every task.
Two distinctions matter when comparing this model: it prints both sides automatically, but its feeder scans one side at a time; it also uses wireless or USB connectivity rather than a built-in Ethernet socket. These details make it better suited to a wireless small office than a wired-only network or heavy two-sided scanning routine.
Features
- Four office functions: print, copy, color scan and fax from one device.
- Automatic duplex printing: creates two-sided documents on supported plain-paper sizes.
- 50-sheet ADF: feeds multi-page originals for single-sided scanning and copying.
- Dual-band Wi-Fi: supports 2.4 GHz and 5 GHz networks, alongside Wi-Fi Direct and USB.
- 3.5-inch touchscreen: provides job controls and supported cloud-service access.
Specifications
- Print speed
- 19 ppm max.
- Paper tray
- 250 sheets
- Document feeder
- 50 sheets
| Model | MFC-L3720CDW |
|---|---|
| Rated print speed | Up to 19 ppm, black or color, single-sided |
| Paper handling | 250-sheet tray and single-sheet manual feed |
| Document feeder | 50 sheets; simplex scanning |
| Automatic duplex | Printing only |
| Connectivity | Dual-band Wi-Fi, Wi-Fi Direct, USB 2.0; no Ethernet |
| Replacement toner | Brother TN229 / TN229XL family |
| Size / weight | 16.1 W × 17.5 D × 15.8 H inches / 44 lb |
Match it to your document mix
Leave space to lift the scanner lid, refill the tray and open service covers. Choose laser-compatible media, and check the driver’s paper type before printing envelopes or labels. Start a new media type with a single test sheet.
| Mostly one-sided originals | The ADF keeps routine scan/copy jobs moving without loading each page on the glass. |
|---|---|
| Frequent two-sided originals | Plan manual handling, or choose a model with automatic duplex scanning. |
| Shared wireless office | Position the printer where the Wi-Fi signal is reliable and paper access remains clear. |
| Consumable planning | Budget for toner plus the separately replaceable drum, belt and waste-toner components. |
Common questions
Does duplex mean it scans both sides?
No. The MFC-L3720CDW automatically prints two-sided pages but does not automatically scan both sides through its ADF.
Can I use a wired network cable?
There is no built-in Ethernet interface. Use Wi-Fi for network sharing or USB for a direct computer connection.
Does it need a toner subscription?
A subscription is optional. Replacement retail cartridges provide a conventional supply route; any promotional trial has separate current enrollment terms.
Can a Mac use it?
Brother directs macOS users to AirPrint for printing and scanning on this model. Verify support for your OS and intended application rather than expecting a traditional Mac printer driver.
Product information & sources
Model details checked against the exact catalog listing and manufacturer references. Software, network services and operating-system support should be checked for your intended setup. Brother MFC-L3720CDW specifications; Brother driver and OS support. Reviewed September 2026.
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