Quick overview from the supplier:
Wireless N Router TP-LINK "TL-MR3420",Compatible with UMTS/HSPA/EVDO USB modem,3G/WAN failover,2T2R
// Compatible with LTE/HSPA+/HSUPA/HSDPA/UMTS/EVDO USB modems, tested in the field
3G/4G and WAN connection Backup guarantees an "Always-online" Internet connection
Local wireless HD video sharing, with speeds up to 300Mbps
Easy one-touch wireless security encryption with the WPS button
Bandwidth control allows administrators to determine how much bandwidth is allotted to each PC