Sapido RB-1842 3G/4G Wireless N Energy-Saving Green Router w/ USB 2.0 Port, Power Saving 150 Mbps Wi-Fi 802.11n w/ Dual Active Firewalls and Detachable 3dBi Antenna, Compatible w/ iPhones, Androids, Blackberry phones for Internet Sharing

From the Manufacturer:
The green RB-1842 Wi-Fi Router is ideal for use in big homes, dormitories, and office buildings and conveniently supports all broadband connections, including 3G/4G USB modems, smartphones, and Wi-Fi-enabled devices like laptops and tablets. It features a mobile hotspot that allows you create an instant Wi-Fi hotspot on-the-go for people to share files while keeping out unauthorized users with its advanced dual firewall security system.* With over 20,000 sessions, the RB-1842 gives the speediest P2P download possible, and the smart QoS system assigns priority for streaming audio and video data as well as online gaming to eliminate lag. It also adjusts its power consumption according to the auto-detect feature and consumes much less electricity than the average router.

Key Features:

Superior Wireless Speed
Built-in Wireless-N (802.11n) technology offers speeds up to 150 Mbps for a smooth and seamless internet experience

Internet Access through Various Connections
Share various kinds of broadband connections, including 3G/4G modems and smartphones, xDSL/cable/fiber, and Public Wi-Fi

High Gain Antenna
7.5in super long high gain antenna enhances the wireless range and coverage

Quality of Service Technology (QoS)
Optimizes multimedia content and traffic which is deal for streaming your favorite movies, TV shows, and music

Advanced Security
One-touch WPS (Wi-Fi Protected Setup), advanced encryption types, and dual active firewalls keep unwanted users out of your wireless network

*While this device does support Internet tethering, different wireless carriers have different policies, service plans, and limitations regarding tethering. Certain mobile phone carriers may charge you a fee for Internet tethering, so please contact your carrier for their policy and associated fees.