http://5gstore.com/product/6042_pepwave_max_hd4.html This router features four embedded modems and you will need SIM cards with active service from a compatible provider to use them. The HD4 has standard 2FF SIM slots - if you plan to use a micro or nano SIM, you'll need a SIM adapter. 5Gstore is a Peplink Certified Partner Fast Facts About This Product: This router is best for: Enterprise users wanting to load balance and/or aggregate between several wireless internet connections and want a solution with embedded/integrated Verizon and AT&T 3G/4G modems (aggregation/bonding requires the Max HD4 and a Balance 210 or higher router, or SimplyBonding from 5Gstore). http://5gstore.com/product/5248_simply_bonding.html Internet Connections Supported: 4 Embedded 3G/4G, 2 Wired WAN, 1 USB (view full compatibility chart), WiFi as WAN* (more info) Networks Supported for Embedded Modems: 4G LTE (B2/1900, B4/AWS (XLTE), B5/850, B13/700, B17/700, B25/1900), WCDMA/HSDPA/HSUPA/HSPA+/DC-HSPA+ (B1/2100, B2/1900, B4/AWS, B5/850, B8/900), EV-DO Rev.A (BC0/800, BC1/1900, BC10/800) WiFi Standard: 802.11 B, G, N; 2.4GHz and 5.0GHz (concurrent) WiFi Range: 300-400' through walls, much greater unobstructed (variable depending on interference from other electronics and physical interference such as walls and ceilings) Ethernet ports: 8 GbE LAN + 2 GbE WAN Size: 1.9" x 11.5" x 6.9" Bonding: SpeedFusion VPN Bonding. NOTE: Many factors influence the real-world throughput you'll see from bonded connections, including latency, connection type, connection speeds, traffic type, and reliability on both sides of the SpeedFusion tunnel. Cellular users should note that bonded cellular connections suffer from "flow control" of TCP traffic at the carrier level, and 5Gstore cannot guarantee that bonding multiple cellular connections will result in faster speeds (however, the other benefits of SpeedFusion remain, such as unbreakable VPN, session persistence, and 100% up-time as long as you have 1 healthy WAN). Many mobile Internet options are available today, including 3G/4G cellular, Wi-Fi, Satellite, WiMAX, LTE, and many more. However, coverage and speeds vary drastically between providers and locations. The Pepwave MAX allows you to combine multiple wireless Internet connections and intelligently manages them to accommodate the changing environment. Everything is automatic. You can stay connected and productive. Our unique modular approach gives you the freedom to choose exactly what Internet services are the best fit for your area. Unlike other mobile routers the MAX doesn't force you to use one technology or provider - you can combine the benefits of up to six connections. You have the freedom to connect to whatever provider or technology makes sense for your application. Need more bandwidth? Add another connection. Coverage poor in some areas? Add another provider. The MAX intelligently manages all connections to give you the best experience possible.