Brother MFC-J270W - Manual (Page 114)

100
Interfaces
D
1 Your machine has a USB 2.0 Full-Speed interface. This interface is compatible with USB 2.0 Hi-Speed; however, the
maximum data transfer rate will be 12 Mbits/s. The machine can also be connected to a computer that has a USB 1.1
interface.
2
Third party USB ports are not supported.
USB
1 2 Use a USB 2.0 interface cable that is no longer than 6 feet (2 m).
Wireless LAN IEEE 802.11b/g (Infrastructure/Ad-hoc Mode)