There are multiple revisions of the TL-WN851N, each with version specific drivers, firmware, installation guides, User Guides, and other resources.

• Some Products have more than one version, for example, a name ending with V1, V2, etc. Click here to see how to discern the hardware version. The available hardware versions are shown below, please choose the right one for your device.

Hardware Version	Description
TL-WN851N V2	Wireless N PCI Adapter
TL-WN851N V1	Wireless N PCI Adapter

NOTE: No upgrade between hardware versions is available.