• Overview
  • Tech Specs
  • Accessories

Add More USB 2.0 Connections and a
Bit of Extra Power, Too

4 flash drives connected to Sonnet's 4-port USB 2.0 ExpressCard/34 Portable drives, flash drives, iPod® and iPhone® mobile digital devices, memory card readers, mice, keyboards, printers, scanners, digital cameras, digital camcorders, audio interfaces, microphones, turntables—just how many USB peripherals do you own? How many USB ports does your computer have? Get Sonnet's 4-Port USB 2.0 ExpressCard/34 adapter so you can connect more of your USB peripherals at the same time. This Sonnet card uses the additional, unused USB port present in the ExpressCard slot's interface and works as a hub to expand it to four ports.

Key Features

Simple way to add four USB 2.0 ports to any compatible computer

Supports bus-powered 2.5" drive plus three low-power devices—5V, 650 mA capacity for all ports combined

Plug and play—no drivers to install

Supports simultaneous low-, full-, and hi-speed device connections.

Compatible in ExpressCard/34 and ExpressCard/54 slots


Do you store files on a portable drive, but want to travel light? The Sonnet 4-Port USB 2.0 ExpressCard/34 adapter supplies 5V DC current to connected devices, so you can connect and operate your bus-powered 2.5" drive plus three low-power devices without plugging into an AC adapter! This Sonnet adapter just works—it delivers plug-and-play operation, so there are no drivers to install, and features hot-pluggable and hot-swappable device connection with automatic device configuration.



Part No.  
USB2-4P-E34 4-Port USB 2.0 ExpressCard/34 - Discontinued
Warranty 1-year
Form Factor ExpressCard/34 computer card
Bus Interface ExpressCard/34
Peripherals Supported Supports all industry standard USB 2.0/1.1 peripherals
Cables Supported USB cables with A-type connector
Number of Ports 4
Standard USB Specification v. 2.0/1.1/1.0 compatible. Complies with OHCI (Open Host Controller Interface) and EHCI (Enhanced Host Controller Interface)
Data Transfer Rate USB 2.0: Up to 480 Mbits/sec; USB 1.1: Up to 12 Mbits/sec
Number of Devices Supported Up to 127
Hot Plug Supports hot-pluggable and hot-swappable device connection
Bus Power 5V, 650 mA (for all ports combined)
RoHS Compliant Yes
Package Contents
  • 4-port USB 2.0 ExpressCard/34 Computer Card
  • Documentation


Specifications subject to change without notice.






Mac Compatibility

MacBook® Pro (with an ExpressCard slot)(1)

OS X® 10.5.8+

macOS Sierra compatible

PC Compatibility

PC notebook (with an ExpressCard slot)

Windows® 10, 8, 7, Vista®, and XP (SP2)

Technical Notes

  1. Card cannot be hot-plugged into a MacBook Pro 6,1 (17-inch, mid 2010) or a MacBook Pro 8,3 (17-inch, early 2011). Must boot with card installed.


Mac OS logo Windows logoExpressCard/34 logoRoHS Compliant logo



Accessories Part No. Description
ExpressCard/34 to 54 Stabilizer ExpressCard/34 to 54 Stabilizer E34-E54-BK Brace for stabilizing an ExpressCard/34 adapter card in an ExpressCard/54 slot