Atlona  AT-OME-MH21 Two-Input Switcher for HDMI and USB-C with USB Hub freeshipping - AV Store

Atlona AT-OME-MH21 Two-Input Switcher for HDMI and USB-C with USB Hub

Product Type: Switchers

Brand: Atlona


The Atlona AT-OME-MH21 is a compact, versatile switcher with HDMI and USB-C  inputs. It is equipped with features for complete AV integration in huddle rooms and small meeting spaces, including automatic switching and display control, audio de-embedding, and a USB 3.0 hub for video conferencing peripherals or touch displays. Part of the Omega Series of integration products for modern AV communications and collaboration, the OME-MH21 is HDCP 2.2 compliant and supports 4K HDR and 4K/60 4:4:4 at HDMI data rates up to 18 Gbps. Additionally, 4K downscaling to 1080p @ 60, 30, or 24 Hz is available when connected to an HD display. The OME-MH21 includes USB 3.0 and USB-C interfaces for two host PCs, plus two peripheral devices such as a camera, microphone, speakerphone, touch-enabled display, or keyboard and mouse.

USB for Video Conferencing with Zoom, Skype for Business, Microsoft Teams, and More

The OME-MH21 features interfacing for host PCs and USB peripherals, making it ideal for video conferencing and UC (unified communications) platforms such as Zoom, Skype for Business, Microsoft Teams, Cisco WebEx, BlueJeans, and GoToMeeting. Available from Altona is the AT-HDVS-CAM PTZ camera with USB interface.

Compact, Flexible Switcher with Integrated AV System Automation

The OME-MH21 combines the benefits of auto-switching, integrated display control, USB interfacing, and more. It incorporates many popular integration convenience features, while delivering excellent performance and value for 4K presentation and video conferencing applications. The USB-C input is ideal for AV interfacing with newer laptops and mobile devices, plus data connectivity to the USB hub. For additional integration convenience, the OME-MH21 features audio de-embedding and remote management with Atlona Management System (AMS).

Automatic Display Control

The OME-MH21 provides control to a display through IP, RS-232, IR, or CEC*, without the need for a separate control system. This simplifies system design and integration while reducing costs. With automatic display control, the OME-MH21 can trigger a display to power on automatically whenever a laptop or other device is connected. At the end of the presentation, when the presenter disconnects the laptop, the OME-MH21 forces the display to power off. Ease of presenter interaction with the system, and the savings incurred by automatic display shutdown provide a significant return on investment. The OME-MH21 display control capability can also be triggered by an external control system.

Reliable Auto-Switching

The OME-MH21 can automatically select an input source based on detection of the 5 volt hot plug detect (HPD) signal, as well as active video. This ensures reliable auto-switching operation for all video sources, including DVRs, DisplayPort / Mini DisplayPort adapters, and other devices that always maintain the HPD line at the 5 volt “high” state but may not be delivering active video.


  • Two-input AV switcher with HDMI and USB-C inputs
  • USB-C input for AV and data
  • Integrated USB 3.0 hub
  • 4K/UHD capability  60 Hz with 4:4:4 chroma sampling, plus support for HDR formats
  • Selectable 4K to 1080p downscaling
  • Automatic input selection and automatic display control
  • Audio de-embedding


Signal HDMI
Copy Protection HDCP 2.2
Pixel Clock 600 MHz
UHD/HD/SD 4096×2160@60/50/30/25/24 Hz
3840×2160@60/50/30/25/24 Hz
1920x1080p@60/59.9/50/30/29.97/25/24/23.98 Hz
1920x1080i@30/29.97/25 Hz
1280x720p@60/59.94/50 Hz
720x576p@50 Hz
720x576i@50 Hz
640x480p@60/59.96 Hz
640x480i@30 Hz
All resolutions are 60Hz
4K@24 Hz
4K@30 Hz
4K@60 Hz, 4:2:0
1080p@24 Hz
1080p@30 Hz
1080p@60 Hz (YUV/RGB, 4:4:4)
USB-C Up to 4K/UHD @ 60 Hz
Color Space YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2, 4:2:0
Color Depth 8-bit, 10-bit, 12-bit
HDR HDR10, Hybrid-Log Gamma (HLG), and Dolby® Vision™ @ 60 Hz
HDMI Pass-Through Formats PCM 2.0
LPCM 5.1
LPCM 7.1
Dolby® Digital
Dolby Digital Plus™
Dolby TrueHD
DTS® Digital Surround™
DTS-HD Master Audio™
Bit Rate 24 Mbits/s max
Analog Audio
Format 2-channel stereo
Balanced Output
Frequency Response 20 Hz to 20 kHz, ±0.5 dB

150 Ω

Stereo channel separation > 90 dB
THD + N < 0.004% @ 20 Hz to 20 kHz
SNR > 94 dB @ 1 kHz, zero clipping @ 0 dBFS, unweighted
Compliance 3
Maximum Data Rate 5 Gbps(2)
USB-C® Supports audio, video, device and host data
Port 1 x RJ45
Standards and Protocols HTTPS, Telnet, MSDNs
Speeds 10/100/1000 Mbps
DHCP, Static – selectable through rear panel, IP & RS-232 commands, and built-in web server
Port 2 x 3-pin captive screw
Use Device control and configuration
Baud Rates 2400, 4800, 9600, 19200, 38400, 57600, 115200
Data flow Bidirectional
Use Pass-through control
Frequency Range 30 kHz to 60 kHz
Port HDMI, Type A, 19-pin female
Triggering Through IP, RS-232, and built-in web server
Resolution / Distance 4K/UHD - Feet / Meters 1080p - Feet / Meters
HDMI IN/OUT 15 5 30 10
USB-C 10 3 10 3
Buttons and Indicators
2 – momentary, tact-type
2 – momentary, tact-type
3 – LED, green
2 – LED, green
HDMI IN 1 – Type A, 19-pin female
USB-C IN 1 – USB Type-C v3.1, 24-pin female, AV input (Alternate Mode)
HDMI OUT 1 – Type A, 19-pin female
USB HUB 2 – Type A, 4-pin female
USB HOST 1 – Type B, female
AUDIO OUT 1 – 5-pin captive screw, balanced / unbalanced 2-channel
RS-232 / IR OUT 1 – 4-pin captive screw (bidirectional)
LAN 1 – RJ45, 100Base-T
PWR 1 - Barrel connector, locking
Environmental Fahrenheit Celsius
Operating Temperature #ERROR! 0 to +50
Storage Temperature -4 to +140 -20 to +60
Operating Humidity (RH) 20% to 90%, non-condensing
Consumption Max: 14.5 W
External Power Supply
100 - 240 V AC, 50/60 Hz
Output: 5 V / 4 A DC
Dimensions (H x W x D) Inches Millimeters
Unit 1.02 x 8.62 x 5.98 26 x 219 x 152
Power Supply (AT-PS-54-L) 1.22 x 1.97 x 3.17 31 x 50 x 80.6
Weight Pounds Kilograms
Device 2.15 0.975
Device CE, FCC
Power Supply CE, FCC, UL

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