Description

Product Description

The TP-Link TL-WN781ND 150Mbps Wireless N PCI Express Adapter is a reliable internal Wi-Fi solution designed for desktop computers. It installs into a PCI Express slot and provides stable wireless connectivity for everyday internet use such as browsing, streaming, and online communication.

It supports IEEE 802.11b/g/n standards and delivers wireless speeds up to 150Mbps on the 2.4GHz band. Compared to traditional PCI network cards, it offers better stability, wider compatibility, and improved wireless performance.

The adapter comes with a detachable omni-directional antenna that can be adjusted or replaced for better signal reception and wider coverage. It supports WPA/WPA2 security standards to ensure a secure wireless connection.

Its compact PCIe design makes it suitable for most desktop PCs, providing a clean internal installation without occupying external USB ports.

Key Features

• 150Mbps Wireless N (802.11n) PCI Express adapter
• Stable 2.4GHz wireless connectivity
• PCIe x1 interface for desktop PCs
• Detachable high-gain antenna for better coverage
• Adjustable antenna position for signal optimization
• WPA/WPA2 secure wireless encryption
• SoftAP mode support (PC hotspot feature, driver dependent)
• Compact internal installation design
• Reliable everyday internet performance
• Ideal for basic home and office use

Technical Specifications

Wireless

• Standard: IEEE 802.11b/g/n
• Frequency: 2.4GHz (2.400–2.4835GHz)
• Speed: Up to 150Mbps
• Wireless Modes: Ad-Hoc / Infrastructure

Interface

• PCI Express (x1)

Antenna

• 1 × detachable omni-directional antenna
• Antenna gain: 2dBi
• RP-SMA connector

Security

• 64/128-bit WEP
• WPA / WPA2
• WPA-PSK / WPA2-PSK

System Compatibility

• Windows 7 / 8 / 8.1 / 10 / 11
• Linux (driver dependent)

Design

• Internal PCIe network card
• Compact low-profile compatible design
• External antenna for signal flexibility

Performance Features

• Stable 2.4GHz performance
• Improved range vs basic USB adapters
• Reliable desktop Wi-Fi connectivity

Use Cases

• Desktop PC Wi-Fi connectivity upgrade
• Home internet browsing and streaming
• Office workstation networking
• Basic online gaming and communication
• Replacing weak or missing Wi-Fi adapters
• Stable long-term wireless connection