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Compact USB-A dongle with RJ45 port, matte black finish

Rocstor

Rocstor Premium 2.5GbE USB-A to Ethernet Adapter

SKU CH-HDXX-JP90W

Adds 2.5GbE wired networking to USB-A laptops with multi-speed support down to 10M and no external power needed

  • Multi-speed Ethernet up to 2.5 Gbps
  • USB 3.0 Type-A plug works with many laptops
  • Wake-On-LAN lets you wake the PC remotely
  • Full-duplex flow control keeps data moving smoothly
  • Bus-powered design needs no extra power supply

Professional Network Adapter

The Rocstor Premium 2.5GbE USB-A to Ethernet Adapter adds a high-speed RJ45 port to USB 3.0 Type-A devices such as HP ZBook, Dell Precision, and Lenovo systems. It targets professionals who need reliable wired connectivity without opening their laptop or workstation. The adapter draws power directly from the USB bus, so no external supply is required.

Portable Build and Connectors

A compact plastic housing protects the controller while keeping the unit light enough for daily carry. The fixed USB-A plug inserts into any USB 3.0 port and also operates on legacy ports at reduced throughput. The RJ45 jack locks securely with a standard latch, resisting accidental disconnects during transport or desk vibration.

Multi-Rate Ethernet Performance

The controller negotiates automatically at 10M, 100M, 1G, and 2.5G speeds, delivering full-duplex flow control and Wake-On-LAN support. This makes the adapter the right part for networks that have already migrated beyond 1G but have not yet adopted 10G infrastructure. It will not satisfy buyers who need 10G or fibre connectivity.

Highlights

  • Multi-speed Ethernet up to 2.5 Gbps
  • USB 3.0 Type-A plug works with many laptops
  • Wake-On-LAN lets you wake the PC remotely
  • Full-duplex flow control keeps data moving smoothly
  • Bus-powered design needs no extra power supply

Specifications

BrandRocstor

Questions about this item

What real-world throughput does the USB 3.0 Type-A interface cap the 2.5 GbE link at?

The USB 3.0 Type-A port limits the adapter to its 5 Gbps signalling rate, so the 2.5 GbE connection runs at line speed while leaving headroom for protocol overhead.

Does the adapter need a separate power brick or mounting bracket to work?

No, it draws all power from the USB bus and has no mounting holes; just plug the Type-A connector into the host and the RJ45 cable into the network.

After plugging it in, what driver step is required before Wake-On-LAN will function?

Install the vendor driver for your operating system, then enable Wake-On-LAN in the adapter’s advanced properties or the system BIOS.

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