WiFi USB Adapter Comfast CF-812AC — Dual Band 2.4GHz / 5GHz, up to 1300Mbps

Comfast CF-812AC is a compact USB WiFi adapter that adds or upgrades wireless connectivity for PCs and laptops. It supports Dual Band operation on 2.4 GHz and 5 GHz and delivers combined throughput up to 1300 Mbps. The adapter connects via USB 3.0 (backward compatible with USB 2.0 and 1.1), has a built-in 2 dBi antenna and a textured, non-slip black housing designed for portability and everyday use.

Advantages

The adapter provides high transmission speeds and improved signal reception for devices with weak or damaged internal network cards. USB 3.0 enables faster data transfer while maintaining compatibility with older USB ports. The unit supports AP (Access Point) mode to share a wired network as WiFi for phones or tablets. Its compact, fingerprint-resistant design makes it easy to carry and use without adding bulk.

Suitable for

• Adding WiFi to desktops or laptops without working wireless cards
• Upgrading older computers to faster 802.11ac wireless
• Streaming video, video calls and online gaming on 2.4 GHz or 5 GHz
• Creating a simple WiFi hotspot using AP mode

Key specifications

• Model: Comfast CF-812AC
• Wireless standard: IEEE 802.11a/b/g/n/ac
• Frequency bands: Dual Band 2.4 GHz and 5 GHz (5.8 GHz)
• Max throughput: 1300 Mbps (400 Mbps on 11n + 867 Mbps on 11ac)
• Transmission power: 18 dBm
• Security: WEP, WPA/WPA2, WPA-PSK/WPA2-PSK
• Interface: USB 3.0 (backward compatible with USB 2.0/1.1)
• Antenna: built-in 2 dBi
• Size: 38.5 x 17 x 8.5 mm
• Color: Black
• Supported OS: Windows 10/8.1/8/7/Vista/XP (32/64 bit), Mac OS 10.6–10.15
• Package contents: WiFi+BT adapter, CD driver, manual
• Warranty: 24 months

How to use

Insert the Comfast CF-812AC into an available USB port on your computer. If using USB 3.0, plug into a USB 3.0 port to achieve maximum transfer speeds; the adapter also works in USB 2.0 and 1.1 ports at lower speeds. Install the driver from the supplied CD or download the latest driver from the manufacturer’s website if required. After driver installation enable the wireless adapter in your OS, select the desired WiFi network or set up AP mode to share a wired connection.

Recommendations

For best performance place the adapter in a USB port with minimal obstructions and away from large metal objects or other strong radio sources. Use the 5 GHz band for high-bandwidth activities like streaming or gaming and 2.4 GHz for longer range. Keep drivers updated to ensure compatibility and security.