Quick overview from the supplier:
TP-LINK TL-MR3420 N300 Wireless 3G/4G Router, USB 2.0 Port for UMTS/HSPA/EVDO USB modem, 3G/WAN failover, 3G/WAN Connection Back-up, 2T2R, 300Mbps 2.4GHz, 802.11n/g/b, Built-in 4-port Switch, with 2 detachable antennas
