The Huawei B681 is a wireless router that supports multiple devices and high-speed internet connections. It has a built-in 3G modem that supports HSPA+ technology, providing download speeds of up to 28.8Mbps and upload speeds of up to 5.76Mbps. The router also has four Ethernet ports for wired connections and supports Wi-Fi 802.11b/g/n standards. It has a sleek design and can be easily set up and managed through a web interface.

The B681 is a router manufactured by the company Huawei that allows multiple devices to connect to a network and communicate with each other. It works by receiving data packets from devices and forwarding them to their intended destination. The router is assigned a unique IP address 192.168.1.1, which serves as its identifier on the network.

To access the router's settings and configure its functions, users can log in using a web browser and their admin and admin. Once logged in, users can customize various settings such as network name, password, and security protocols. They can also set up parental controls, prioritize bandwidth usage, and monitor network activity.