Adder Professional VGA, USB 4 port switch with USB True Emulation Technology


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Video Input: VGA
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The ADDER AV4PRO-VGA is a Professional VGA, USB 4 port switch with USB True Emulation Technology. It is a is a professional grade KVMA switch delivering ultimate flexibility for users who wish to share a high resolution screen and modern USB peripherals between a multiplicity of computers.

The AV4PRO-VGA-US is designed to enable four computers to be controlled from a single high resolution KVM console using high definition analogue VGA video links. The switch makes use of Adder's True Emulation technology which enables USB HID devices to be continuously emulated to each computer. This unique technology enables instantaneous and reliable hotkey switching whilst also supporting the extra keys and features of enhanced keyboards and mice. Furthermore, the AdderView includes two independently switchable USB 2.0 channels and an audio channel, giving the user the flexibility to attach selected peripherals to different computers.

  • Access up to four computers with one display, keyboard and mouse
  • High definition VGA video up to 1920 x 1200 (WUXGA) or 1920 x 1440
  • USB keyboard & mouse with support for almost any keyboard and mouse, graphics tablet, jog shuttle, joystick, 3D explorer, etc.
  • USB 2.0 Hub (2-Port) with broad high speed device support
  • Stereo audio support via 3.5mm auxiliary jacks

Adder AV4PRO-VGA 4 Port Switch Application Diagram

Adder AV4PRO-VGA Features

  • Adder AV4PRO-VGA High Definition VGA with extended profile DDC EDID

    High Definition VGA with extended profile DDC EDID

    The AdderView Pro AV4PRO-VGA features high resolution VGA video with extended profile DDC EDID. The extended DDC EDID profile ensures that the switched graphics card is always optimised to work with your screen. The VGA capabilities enable users to work at very high resolutions including WUXGA (1920 x 1200) or (1920 x 1440) for intensive applications such as media/graphic design or detailed medical imaging.
  • Adder AV4PRO-VGA supports modern keyboards & mice, graphics tablets, jog shuttles, joysticks, and 3D explorers.

    True USB 2.0 emulation

    Unlike most KVM switches, which only support the most basic keyboard and mouse features, Adder's revolutionary 'True Emulation' allows you to use the extra function keys, wheels, buttons and controls that are commonly found on modern keyboards and mice. You can also use any other USB interface device including graphics tablets, jog shuttles, joysticks, 3D explorers, and wireless bluetooth keyboard & mouse*.

  • Adder AV4PRO-VGA - Independent USB & Audio device switching

    Independent USB & Audio device switching

    The AdderView Pro AV4PRO-VGA includes two independently switchable USB 2.0 channels and an audio channel, giving the user the flexibility to attach selected peripherals to different computers. For example, use the KVMA console to work on one computer whilst your USB peripherals are connected to other computers and your speakers are playing music from yet another.

  • Adder AV4PRO-VGA - transparent USB 2.0 Hub with broad high speed device support

    Broad High Speed device support - Transparent USB 2.0 Hub

    An integrated transparent 2-port USB 2.0 hub allows a vast range of USB devices can be connected to the AV4PRO-VGA from non standard keyboard / mouse devices to flash drives, printers and scanners.

  • Adder AV4PRO-VGA Fast & Reliable Switching

    Fast & Reliable Switching

    Country code reporting, extended DDC EDID profile and continuous keyboard and mouse emulation ensure faultless operation. The USB 2.0 switching action has also been carefully engineered to ensure maximum computer reliability when connecting and disconnecting USB devices.

  • Adder AV4PRO-VGA channel selection via remote

    Channel selection options

    The AdderView Pro AV4PRO-VGA can be switched using the front panel buttons, selectable keyboard hotkeys, 3 button mice, an On-Screen-Display (OSD), or using simple ASCII codes via serial RS232. Optionally, you can also use the RC4 remote switch to make your selection. These switching options allow you to rapidly reassign connected devices to any of the connected computers.

  • Adder AV4PRO-VGA Multi-platform support

    Multi-platform support

    The AV4PRO-VGA works with all known software and computer platforms, with PS/2, USB and Sun, including Windows (all), DOS, Linux, Unix, BSD, all Sun OS, all Mac OS, NetWare, etc.

  • Adder AV4PRO-VGA - Plug and Play

    Plug and Play

    AdderView Pro KVM devices are delivered in a zero configuration state so you can plug them in and start working on them straight away. There is no need for drivers or software to be installed.

  • Adder AV4PRO-VGA serial RS232 port for control, synchronisation and upgrade

    Serial RS232 port for control, synchronization and upgrade

    • Remotely switch AV4PRO-VGA using simple ASCII codes
    • Integration with RS232 controlled power switches to provide a complete hard reboot function
    • Flash upgrade

  • Adder AV4PRO-VGA as a 4-port 5-monitor, quad-monitor, triple-monitor, or dual-monitor KVM Switch

    Expand up to a 5-monitor KVM Switch

    AV4PRO-VGA can be linked with another Adder AV4PRO unit to create up to a 4-port dual-monitor, triple-monitor, quad-monitor, or 5-monitor KVM Switching system, by using a VSC41 synchronisation cable.

AV4PRO-VGA-US Package Contents

Adder AV4PRO-VGA Package Contents

  1. (1) AV4PRO-VGA KVM Switch
  2. (1) Power adapter (12.5W) and US-specific power lead
  3. (1) Quick start guide and Safety document
  4. (4) Self-adhesive rubber feet
  5. (1) 2-Year Limited Warranty & Lifetime World Class Support

AV4PRO-VGA Resources

Adder Infinity AV4PRO-VGA Manual Screenshot Adder AV4PRO-VGA Datasheet (PDF)
Adder AV4PRO-VGA Manual (PDF)

Adder AV4PRO-VGA Specifications

Height1.7 in. (44 mm.)
Width9.17 in. (233 mm.)
Depth 4.53 in. (115 mm.)
Physical Design1U high metal case
Hardware CompatibilityAll computers with USB interfaces
Software CompatibilityOperates with all known software and operating systems including Windows (all), DOS, Linux, Unix, BSD, all Sun OS, all Mac OS, NetWare etc.
Computer connections at switchUSB 2.0 type B, Hi Res VGA (up to 4 connections)
3.5mm stereo jack
Local KVM Console Connection Video 
Video1x VGA (single monitor)
Keyboard/Mouse2 x USB type A
Switched USB 2 x USB 2.0 type A
Audio 3.5mm stereo jack
Other ConnectionsOptions (flash upgrade, sync with other AV4PRO-VGA and RS232 triggered power switches): Modular 10P10C
Power2.5mm DC jack (power adapter included), 100-24-VAC 50/60Hz input to power adapter, 5VDC 2A output from power adapter
Operating Temperature0°C to 40°C / 32°F to 104°F
ApprovalsCE, FCC

The AV4PRO-VGA is also known as the AV4PRO-VGA-US.

Question: What cables come with this unit?
Answer: In addition to the unit itself, the AV4PRO-VGA comes with a power adapter, CD-ROM, and four self adhesive rubber feet.

Question: Can the device allow a single headset (microphone & speaker) and a single webcam to be "used/accessed" by any of the computers? Or if this device cannot support that, do you know of one that can?
Answer: Thank you for your inquiry. You will be looking for a KVM that has audio (speaker and mic) support with a USB hub. This particular unit will support audio speakers and has a USB hub to share peripherals, but unfortunately, it does not have a mic input.

However, there are a number of KVMs out there that will fit the bill. One such switch, that supports DVI monitors, is the If you require different inputs or would like to explore other options, please give us a call at 1-877-586-6654 to discuss your project further.

Question: Does Adder make a 2 port KVM, (e.g. a AV2PRO-VGA)? Also, does Adder make a USB compatible KVM with HDMI capability?
Answer: Thank you for your inquiry. Adder does make a 2-port KVM,the AVG2 Additional 2-port desktop KVMs can be found here:

In terms of an HDMI option, Adder does not have an HDMI KVM available at this time. You can find some of the other HDMI KVM options by clicking here.

Question: after a power cut over the weekend our box the online power light is off. how do we rectify this
Answer: Thank you for your inquiry. Unfortunately, due to the varied nature of user environments, detailed product support is beyond the scope of this simple FAQ.

Having said that, here are a few things you can try. First, ensure the outlet/power strip is receiving power and any fuse that may have blown is reset. Second, unplug the switch and try plugging it back in. If neither of these helps, please contact that manufacturer. The Adder support page can be reached here: Adder also provides a support forum where you may be able to find help. The support forum can be reached here:

Question: Can I use one mouse and one keyboard to control the two monitors?
Answer: Thank you for your inquiry. This KVM switch allows for the control of 4 different PC's from one user station (Monitor, Mouse and Keyboard). If your application requires the support for dual monitors(two screens, one PC), this switch will not work. If you would like a recommendation based on your application, please feel free to contact your KVM Switches Online sales representative.