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ATLONA 2 x 1 Signal Sensing Automatic VGA + Stereo Audio Switcher AT-APC21A

  • Maximum VGA Resolution: 2048x1536 2 x HDB-15 (female) input
  • 1 x HDB-15 (female) output
  • 1 x 3.5 mm audio jack input
  • 1 x 3.5 mm audio jack output
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The ATLONA AT-APC21A is an easy-to-use video VGA switcher that allows you to switch between two VGA sources with audio, and route the selected source to destination display and speakers. It features auto selection of active channel by signal sensing, which eliminates the need of manual control. It also comes with a manual control button for you to manually select your desired source. Up to 350 MHz bandwidth with support for maximum VGA resolutions of 2048×1536 allows pristine, detailed picture quality. The metal casing is rugged and thermal conductive, and a magnetic pad allows easy installation.

detailed view and application

  • newegg Auto Switching This switcher simply senses the presence of a video signal, and automatically switches to the active VGA source to route the signal to the remotely located display. The automatic selection of the active channel eliminates the need of manual control. To switch over to another channel, simply turn on the other device.
  • newegg Manual Switching A manual control button is provided to switch between the two channels.
  • newegg Superb Performance This model supports VGA, XGA, SVGA, UXGA, WUXGA, Multi-Sync, TFT-LCD monitor. It supports 350 MHz bandwidth and maximum VGA resolutions up to 2048×1536 for uncompromising picture quality. It also auto detect monitor type and DDC2B signal for each port for maximized compatibility.
  • newegg Active Channel Indicator An LED indicator informs you of which channel is selected: blue for Channel 1, and green for Channel 2.
  • newegg Flexible Powering Method This unit takes power from VGA signal or DC 5V power adapter (sold separately).

Learn more about the Atlona AT-APC21A




Resolution Support
Maximum VGA Resolution: 2048x1536
Video Bit Rate/Bandwidth


2 x HDB-15 (female) input
1 x HDB-15 (female) output
Analog Aduio
1 x 3.5 mm audio jack input
1 x 3.5 mm audio jack output


LED Indicator
Blue for Channel 1; Green for Channel 2


Power Supply
Taken from VGA signal or DC 5V power adapter (sold separately)


Switch between two VGA w/Audio sources to a single monitor and set of speakers

No software required

Supports VGA, XGA, SVGA, SXGA, UXGA, WUXGA, Multi-Sync and TFT-LCD monitors.

Supports stereo audio

Auto detect monitor type and DDC2B signal for each port

Supports 350 MHz bandwidth with maximum VGA resolution of 2048x1536.

Video enhancement to extend quality video up to 30 meters

Auto switch to new connected VGA channel (Auto Detect & Select)

Optional external control button for manual selection

Dual color LED to indicate active channel status

Power-free, electronic design to protect connected devices

Magnetic pad for ease of installation

Dimensions & Weight

4.44" x 2.44" x 1.14"

Package Contents

Package Content
Atlona AT-APC21A 2x1 Signal Sensing Automatic VGA Switcher w/Analog Audio
Wired manual selector
User Manual

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Atlona AT-APC21A

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