2-Port 4K 18Gbps UHD KVM Presentation Switcher with HDMI/USB-C Inputs/HDMI Output

MSRP: $449.00

MSRP $449


Built for flexible digital presentations, the BG-PS21-4K is a KVM switcher that enables two devices to be connected to the same display at output resolutions of up to [email protected] Thanks to its USB-A ports, users can control two connected devices with one mouse and keyboard. These USB peripherals can be shared between the HDMI/Host connections and the USB-C connection. The device will also automatically switch inputs when a signal is detected via HDMI.

With the ability to de-embed audio and support for audio formats such as LPCM 7.1 audio, Dolby Digital® Plus, and DTS-HD® Master Audio™, you’ll be able to capture crystal clear audio from your presentations.

This KVM switcher is a great option for small to medium sized conference rooms needing extra connectivity for multiple presenters during meetings. Our four-device KVM switcher, the BG-UHD-KVM41 may be a better fit if more than two devices need to be connected for presentation events.

Connectivity & Control

With two HDMI ports for input, the BG-PS21-4K can easily connect two separate devices. There is one HDMI output to send the signal to a single display, enabling presenters to share content during meetings. This device supports HDMI 2.0 and HDCP 2.2. The resolution for HDMI inputs supports up to [email protected] There is also a USB-C port which offers [email protected] resolution. Additionally, the USB-C port provides 40 watts of charging to keep devices online through the entirety of a presentation. Auto-switching between active inputs is also supported.

Using the two USB 3.0/2.0 type-A ports, peripherals like mice and keyboards can be connected to control active content. The unit itself can be controlled via front panel buttons of the RS-232 interface. A 4-pin DIP switch is also provided for EDID settings. A balanced audio output is also included for audio de-embedding.

High Resolution Inputs
Input Resolutions Up To [email protected]
Plug and Play
Easy To Install And Use
Multichannel Audio Supported
LPCM 7.1, Dolby Atmos®, TrueHD, Digital® Plus, DTS: X™, And DTS-HD® Master Audio™ Pass-Through
Eliminates Connection Issues
Automatically Selects Input When Change In Signal Is Detected
HDCP 2.2
High-Bandwidth Digital Content Protection Creates A Secure Source To Display Connection
  • 18G 2x1 switcher with HDMI and USB-C inputs
  • Supports automatic switching
  • Controllable via front panel buttons and RS232
  • Supports HDMI 2.0, [email protected] 4:4:4, HDR 10, Dolby Vision, HDCP 2.2
  • Provides charging on USB-C port up to 40W
  • Provides USB data (USB 3.0/2.0) and 4K video transmission on USB-C port
  • Smart EDID management for various applications and customized settings
  • Balanced analog audio for audio de-embedding
  • Front panel buttons trigger both CEC and RS232 commands for display control



Video Input

(1) HDMI, (1) USB-C

Video Input Connector

(1) Type-A female HDMI, (1) Type-C USB

HDMI Input Resolution

Up to [email protected] 4:4:4 8bit

USB-C Input Resolution

Up to [email protected] 4:4:4

Video Output

(1) HDMI

Video Output Connector

(1) Type-A female HDMI

HDMI Output Resolution

Up to [email protected] 4:4:4 8bit

HDMI Version


HDCP Version


USB Version


HDR 10







Audio Output

(1) AUDIO OUT (Stereo balanced L/R)

Audio Output Connector

(1) 5-pin terminal block

HDMI Audio Format

LPCM 7.1 audio, Dolby Atmos®, Dolby® TrueHD, Dolby Digital® Plus, DTS: X™, and DTS-HD® Master Audio™ pass-through

Stereo balanced L/R audio Format


Max Output Level

2.0Vrms ± 0.5dB. 2V = 16dB headroom above -10dBV (316mV) nominal consumer line level signal


<0.05% (-80dB), 20Hz ~ 20KHz bandwidth, 1KHz sine at 0dBFS level (or max level)


>80dB, 20Hz ~ 20KHz bandwidth

Crosstalk Isolation

>70dB, 10KHz sine at 0dBFS level (or max level before clipping)

L-R Level Deviation

< 0.3dB, 1KHz sine at 0dBFS level (or max level before clipping)

Frequency Response Deviation

<±0.5dB 20Hz ~ 20KHz

Output Load Capability

1KΩ and higher (supports 10x paralleled 10KΩ loads)

Stereo Channel Separation

>[email protected]

Control Part


(1) EDID, (1) FW, (1) RS232, (1) HOST, (2) DEVICE

Control Connector

(1) 4-pin DIP switch, (1) Micro-USB, (1) 3-pin terminal block, (1) Type-B USB 3.0, (2) Type-A USB 3.0


HDMI 2.0 Cable Length

[email protected] 4:4:4 ≤ 5m, [email protected] 4:2:0 ≤ 10m, 1080P ≤ 15m



Operation Temperature

14°F ~ 131°F / -10°C ~ +55°C

Storage Temperature

-13°F ~158°F / -25°C ~ +70°C

Relative Humility

10% ~ 90%

External Power Supply

Input: AC 100~240V, 50/60Hz, Output: 24V DC 2.71A

Power Consumption

54W (Max)

Dimension (W*H*D)

6.6" x 1.0" x 3.7" [168.0mm x 24.5mm x 95.0mm]

Net Weight

0.54lbs [245g]


Ideal fit for:
  • Conference Rooms
  • Auditoriums
  • Classrooms
  • Small Businesses
  • Schools/Universities
  • Hospitals
Power LED: This LED will illuminate red when the device is connected to the power supply.
HDMI Input LED: This LED will illuminate green when the HDMI input is selected in AUTO mode, or will illuminate in orange when the HDMI input is selected in MANUAL mode.
USB-C Input LED: This LED will illuminate green when the USB-C input is selected in AUTO mode, or will illuminate in orange when the USB-C input is selected in MANUAL mode.
SELECT AUTO/3s Button: Press this button to select the next input source, or hold this button for at least 3 seconds to enable auto switching mode. Note that the factory default switching mode is AUTO.
DISPLAY On Button: Press ON to turn on the display.
DISPLAY Off Button: Press OFF to turn off the display.
Audio Off Button: Press this button to mute/unmute the display audio.
Volume Down Button: Press this button to decrease the audio volume gradually, or hold it to decrease the audio volume constantly.
Volume Up Button: Press this button to increase the audio volume gradually, or hold it to increase the audio volume constantly.
EDID: 4-pin DIP switch for EDID setting.
FW: Micro-USB port for firmware upgrade.
HDMI IN: HDMI port to connect HDMI input source.
USB-C IN: USB Type-C input that provides 40 watts of charging for connected sources.
HDMI OUT: HDMI port to connect to an HDMI output video display.
AUDIO OUT: Connect to this 5-pin terminal block to output balanced audio to external audio devices.
RS-232: Connect supported devices to this 3-pin terminal block for RS-232 control.
HOST: Connect to this USB 3.0 Type-B port for host connection.
DEVICES: These two type-A USB 3.0 ports are to connect peripheral devices such as a webcam or a speakerphone.
DC 24V: Connect the 24V power supply adapter here to power the unit.

Top Grade KVM Presentation Solution for Small Business | BZBGEAR BG-PS21-4K
Simple KVM Presentation Switcher Effective for Small Business | BZBGEAR BZBGEAR BG-PS21-4K
















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Package Contents
① 1x BG-PS21-4K 2x1 Presentation Switcher
② 2x Mounting Ears with 4 Screws
③ 4x Plastic Cushions
④ 1x 5-pin Terminal Block
⑤ 1x RS232 Cable (3-pin terminal block to DB9)
⑥ 1x Power Cord
⑦ 1x Power Adapter (24V DC, 2.71A)
⑧ 1x User Manual
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