USB Wi‑Fi adapter Comfast CF-811AC — dual‑band 2.4GHz/5GHz, up to 650Mbps

Comfast CF-811AC is a compact USB Wi‑Fi adapter that adds or upgrades wireless connectivity for desktops and laptops. It supports dual‑band operation on 2.4 GHz and 5 GHz and delivers combined throughput up to 650 Mbps. The adapter is ultra‑small — only 7.5 mm protrusion from the USB port — and includes a built‑in 2 dBi antenna. It connects via USB 2.0 and is compatible with a wide range of Windows and macOS versions.

Advantages

The CF-811AC combines dual‑band support and a small form factor to improve reception and network stability on devices with weak or damaged Wi‑Fi modules. It supports AP mode to create a wireless hotspot for phones or tablets and offers hardware encryption compatibility with WEP, WPA and WPA2 standards. Broad OS support and plug‑and‑play installation via included driver CD make setup straightforward.

Suitable for

• Upgrading laptops or desktops that lack modern Wi‑Fi or have poor reception
• Creating a small Wi‑Fi hotspot using AP mode
• Basic web browsing, video streaming and light online gaming
• Users who need a portable, unobtrusive USB network adapter

Key specifications

• Model: Comfast CF-811AC
• Wireless bands: Dual‑band 2.4 GHz and 5 GHz
• Maximum throughput: up to 650 Mbps (11ac 433 Mbps + 11n 200 Mbps / legacy rates)
• Wireless standards: IEEE 802.11a/b/g/n/ac
• Transmission power: 18 dBm
• Encryption: WEP, WPA, WPA2, WPA-PSK, WPA2-PSK
• Interface: USB 2.0
• Antenna: built‑in 2 dBi
• Compatibility: Windows 10/8.1/8/7/Vista/XP (32/64 bit), Mac OS 10.6–10.15
• Size: 19.5 x 15 x 7.5 mm; color: black
• Complete set: mini Wi‑Fi adapter, driver CD, manual
• Warranty: 24 months

How to use

Insert the Comfast CF-811AC into an available USB port. If the operating system does not automatically install drivers, use the supplied driver CD or download the latest driver from the manufacturer. After driver installation select the appropriate SSID and enter the network password to connect. To enable AP mode, follow the software instructions provided in the manual or driver utility.

Recommendations

For best performance place the adapter in a USB port with minimal obstructions and avoid locations near large metal objects. Use the 5 GHz band for higher throughput at close range and 2.4 GHz for better range. Ensure drivers match your OS version to maintain stable operation.