aircraft and disrupt the wireless telephone network. It may also be considered illegal.

Operating Environment

Do not use or charge the device in dusty, damp, and dirty places or places with magnetic fields. Otherwise, it may result in a malfunction of the circuit.

While using the device, observe the local laws and regulations, and respect others' privacy and legal rights.

Place the device or accessories in well-ventilated, cool, and out-of-direct- sunlight place. Avoid enveloping the device, or covering towels and placing articles on the device. Place the device out of a box or case to avoid poor heat dissipation that results in the damage to the device.

On a stormy day with thunder, do not use your device, to prevent any danger caused by lightning.

Keep the ambient temperature between 0°C to 45°C for using the device.

This device should be installed and operated with a minimum distance of 20 cm between the antenna and all persons.

Safety of Children

Comply with all precautions with regard to children's safety. Letting the child play with your device or its accessories, which may include parts that can be detached from the device, may be dangerous, as it may present a choking hazard. Ensure that small children are kept away from the device and accessories.

Accessories

Use the accessories delivered only by the manufacturer. Using accessories of other manufacturers or vendors with this device model may invalidate any approval or warranty applicable to the device, result in the non-operation of the device, and cause danger.

Charger

Use the AC power supply defined in the specifications of the charger. An improper power voltage may cause a fire or a malfunction of the charger.

If the power cable is damaged (for example, the cord is exposed or broken), or the plug loosens, stop using the cable at once. Otherwise, it may lead to an electric shock, a short circuit of the charger, or a fire.

Cleaning and Maintenance

It is normal that your wireless device gets hot when you use or charge it. Before you clean or maintain the wireless device, stop all applications and disconnect the wireless device from your PC.

Use your wireless device and accessories with care and in a clean environment. Keep the wireless device away from a fire or a lit cigarette.

Protect your wireless device and accessories from water and vapor, and keep them dry.

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Huawei B681 quick start Operating Environment, Safety of Children, Accessories, Charger, Cleaning and Maintenance
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B681 specifications

The Huawei B681 is a robust and versatile mobile broadband router designed for seamless internet connectivity, especially in areas where wired connections may be limited. Known for its reliability and performance, the B681 is ideal for personal and small business use, providing users with the capability to connect multiple devices simultaneously.

One of the standout features of the Huawei B681 is its support for 3G network connectivity. It is capable of receiving and transmitting data over HSPA+/HSPA/UMTS networks, ensuring users can enjoy high-speed internet access. With download speeds reaching up to 21.6 Mbps and upload speeds up to 5.76 Mbps, the B681 facilitates smooth streaming, efficient browsing, and stable communications.

The design of the B681 is both sleek and functional, featuring a compact form factor that allows for easy placement in any environment. Its user-friendly interface includes LED indicators for monitoring the status of power, wireless, and network connectivity, making it simple to manage and troubleshoot any connectivity issues.

Equipped with a built-in Wi-Fi access point, the Huawei B681 supports wireless connections for up to 32 devices. This makes it an excellent choice for households or small businesses with multiple users or devices needing internet access. The wireless standard supported is IEEE 802.11b/g, which ensures compatibility with most Wi-Fi-enabled devices, from laptops to smartphones.

The B681 also features advanced security protocols, including WPA/WPA2 encryption, ensuring that user data remains safe from potential threats. The router can be easily configured through its web-based management interface, allowing users to customize settings, manage connected devices, and monitor data usage effectively.

In terms of connectivity options, the Huawei B681 is equipped with Ethernet ports for wired connections, providing flexibility for devices that may require a more stable connection. The WAN/LAN port can also be used to connect to another network, acting as a bridge.

Overall, the Huawei B681 stands out as a reliable mobile broadband solution engineered to deliver high-speed internet access with ease of use and impressive connectivity options. Its blend of advanced technology, security features, and user-friendly design makes it a popular choice for users seeking a dependable mobile router.
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