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4-Port USB 2.0 Peripheral Switch


The US421A is a 4-port USB 2.0 Peripheral Switch that allows up to 4 computers to share the use of a single USB peripheral device (such as a printer, scanner, mass storage drive, etc.) on a one-at-a-time basis.

The peripheral focus can be given to a computer manually by using pushbuttons on the switch, using the software-based configuration utility, or by the Auto Switch function.
Compatible with both Windows and Mac, and with multifunction printer support, the US421A is the ideal way to share the latest USB 2.0 peripherals in a multimedia office environment.

Package Contents

  • 1x 4-Port USB 2.0 Peripheral Switch
  • 1x USB Type A to USB Type B Cable(1.8m)
  • 1x Installation disk
  • 1x User Instructions
  • Enables four computers to share a single USB peripheral device
  • Simple port selection via pushbuttons, configuration utility, or Auto Switch function
  • Auto Switch Function - no need for print server
  • USB 2.0 compliant
  • Supports transfer rates up to 480 Mbps
  • Multiplatform support - Windows and Mac
  • LED indicators display port focus
  • Overcurrent protection
  • Bus-powered
  • Hot pluggable
  • Buzzer indicates switching between computers
  • Supports multifunction printers

4-Port USB 2.0 Peripheral Switch

Console Connections4
Port SelectionPushbuttons, Software, Auto Switch
Computer4 x USB Type B
Device1 x USB Type A
Devices1 (Orange)
Selected4 (Green)
Switches4 x Pushbutton
PowerUSB Bus Powered
Operating Temperature0–40˚C
Storage Temperature-20–60˚C
Humidity0–80% RH, Non-condensing
Physical Properties
Weight0.10 kg ( 0.22 lb )
Dimensions (L x W x H)10.40 x 7.96 x 2.20 cm
(4.09 x 3.13 x 0.87 in.)
NoteFor some of rack mount products, please note that the standard physical dimensions of WxDxH are expressed using a LxWxH format.

ОSDescriptionVer.Release DateFile Name
Mac Software
MacOS 10.10 or higherAP Software for Macv1.0.073 us221a_421a_mac_v1.0.073.zip
MacOS 10.6 or higherAP Software for Macv1.0.072 us221a_421a_mac_v1.0.072.zip
Windows 7, Windows 8, win10 or higherAP Software for Windowsv1.0.097 us221a_421a_win_v1.0.097.zip
Windows 2000, Windows 2003, Windows XP, Windows Vista, Windows 7, Windows 2008AP Software for Windowsv1.0.096 us221a_421a_win_v1.0.096.zip
Windows 2000, Windows 2003, Windows XP, Windows Vista, Windows 7, Windows 2008, x64, x86, Windows 10AP Software for Windowsv1.0.095 us221a_421a_win_v1.0.095.zip
MacOS 10.45 or higherAP Software for Macv1.0.071 us221a_421a_mac_v1.0.071.zip